Questions on Algebra: Polynomials, rational expressions and equations answered by real tutors!

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Question 42101: The area of a triangle varies jointly as the length of its base b and height h.
If A is 75 when b=15 and h=10, find A when b=8 and h=6.
thanks

Click here to see answer by venugopalramana(3286) About Me 

Question 42095: FIND the LCM of the set of polynomials: t^2-t-12 and t^2+2t-24.
Thanks

Click here to see answer by venugopalramana(3286) About Me 

Question 42093: Find the LCM for the pair of polynomial: 7m-21 and 14m-42.
Click here to see answer by venugopalramana(3286) About Me 

Question 42091: For what value(s) of x ist the expression (x^2-4x+4)/(2x^2-3x-2) undifined?
Thanks

Click here to see answer by venugopalramana(3286) About Me 

Question 42080: Write in simplest form
%283%2F%28x%5E2%2B4x%2B3%29%29-%281%2F%28x%5E2-9%29%29
3 divided by
x^2 + 4x + 3


minus

1 divided by
X^2 - 9

Click here to see answer by psbhowmick(878) About Me 
Question 42080: Write in simplest form
%283%2F%28x%5E2%2B4x%2B3%29%29-%281%2F%28x%5E2-9%29%29
3 divided by
x^2 + 4x + 3


minus

1 divided by
X^2 - 9

Click here to see answer by PaulAllen65270(19) About Me 

Question 42022: Write in simplest form.
4r^2 - 25s^2
divided by
2r^2 + 3rs - 20s^2

Click here to see answer by tutorcecilia(2152) About Me 

Question 42106: i would like to know how would i slove this problem? (3+5k^2-2k)+(2k^2-3k-10)
Click here to see answer by tutorcecilia(2152) About Me 

Question 42112: Express result in simplest form

5a – 12
Divided by
a^2 – 8a + 15
minus
3a – 2
Divided by
A^2 – 8a + 15

Click here to see answer by psbhowmick(878) About Me 

Question 42098: Determine the values of x for any holes in the graph of:
f(x)= (x+3)/x^2+5x+6.

Click here to see answer by AnlytcPhil(1806) About Me 

Question 41855: Fungicides account for 1/10 of the pesticides used in the U.S. Insecticides account for 1/4 of all the pesticides used in the U.S. The ratio of fungicides to insecticides used in the U.S. can be written 1/10 divided by 1/4. Write this ratio in simplest form.
Click here to see answer by fractalier(6550) About Me 

Question 42199: Factor the polynomial P(x)= 16x^4-81 completely and find all its zeros.
I factored to (4x^2+9)(4x^2-9) then further to ((2x+3)(2x-3))^2 to get 3/2 and -3/2 both with multiplicity of 2 to equal four zeros. But the solutions given also contain 3i/2 and -3i/2. Also, I'm unsure that the second factoring step is appropriate since by distribution (2x+3)^2 is not equal to 4x^2+9 etc. I'm stumped! Thanks for any help!

Click here to see answer by psbhowmick(878) About Me 

Question 42224: 1. 5 over 2x plus x over 2

2. 4y2(this is y squared) +16y/4y

Click here to see answer by tutorcecilia(2152) About Me 

Question 42162: simplify using Synthetic Division, if possible

t^4+10t^3+35t^2+50t+24/t^2+7t+12

Click here to see answer by fractalier(6550) About Me 

Question 42312: Find the perimeter of a rectangle
x over 2x - 5 is the length and
8 over 2x - 5 is the width.
What is the perimeter.

Click here to see answer by fractalier(6550) About Me 

Question 42318: I have a Final exam tommorow please help. Question: This width of a rectangle is 2cm less than it's length. If the area of the rectangle is 168 cm2 (squared), what is it's width?
i think it's base x height so like x (x-2) = 168 ... x2(sqd) - 2x=168 but then what?!

Click here to see answer by checkley71(8403) About Me 

Question 42339:
Multiply 

  2x² - x - 3      3x² - 11x - 20
——————————————— × ————————————————
 3x² + 7x + 4        4x² - 9

Click here to see answer by AnlytcPhil(1806) About Me 

Question 42160: Solve the following system of equations:
2x + 4y + 6z = 2
x + 2z = 0
2x + 3y – z = -5

Click here to see answer by venugopalramana(3286) About Me 

Question 42387: Solve in simplest form

4y/y^2 + 6y + 5
Plus
2y/y^2-1

Thanks for help

Click here to see answer by vihits13(20) About Me 

Question 42473: Simplify:
negative square root of 25

Click here to see answer by Nate(3500) About Me 

Question 42472: Simplify:
square root of 150

Click here to see answer by Nate(3500) About Me 

Question 42471: Simplify:
(x^3/5)(x^2/3)

Click here to see answer by Nate(3500) About Me 

Question 42470: Simplify, if possible:
5(square root)18 - 6(square root)2

Click here to see answer by Nate(3500) About Me 

Question 42468: Solve:
7 = 8
_ _
x 3

Click here to see answer by Nate(3500) About Me 

Question 42467: Simplify:
8
___
2x-4

Click here to see answer by Nate(3500) About Me 

Question 42489: Please help me understand how to complete problems such as
Factor completely: +9a%5E2+-+24ab+%2B+16b%5E2
Thanks

Click here to see answer by rapaljer(4671) About Me 

Question 41681: Solve
x^2 - 16x + 64 = 0

Click here to see answer by Nate(3500) About Me 

Question 42535: Solve the equation and check for x
x/6 - x/8 = 1
Thanks for help

Click here to see answer by checkley71(8403) About Me 

Question 42543: Simplify: (1 + i)/(2 - i).
Thanks

Click here to see answer by fractalier(6550) About Me 
Question 42543: Simplify: (1 + i)/(2 - i).
Thanks

Click here to see answer by Nate(3500) About Me 

Question 42708: Factor completely:
24x2 - 10x – 4

Click here to see answer by stanbon(75887) About Me 

Question 42802: A plane flies 720 mi. against a steady 30-mi/h headwind and then returns to the same point with the wind. If the entire trip takes 10 h what is the plane's speed in still air?
Click here to see answer by fractalier(6550) About Me 

Question 42795: Can you please help me simplify 1/3^-5 ? Thanks!
Click here to see answer by fractalier(6550) About Me 

Question 42735: Factor each expression
a2(b - c)- 16b2 (b - c)

Thank You!!

Click here to see answer by fractalier(6550) About Me 

Question 42789: Solve the following for x
2/5 = x-2/20
Thanks

Click here to see answer by Nate(3500) About Me 

Question 42810: 9(x-7+8)-2x+8
Click here to see answer by vihits13(20) About Me 

Question 42855: The vertices of ΔABC are A(-3,-4), B(-1,3), C(3,-2). The triangle is rotated 90 degrees counterclockwise.
|0-1|
|1 0| is the rotation matrix used. Find the coordinates of C'.
Thank You

Click here to see answer by fractalier(6550) About Me 

Question 42920: Factor the polynomial 4 a 6 b 7 c 5 - 8 a 7 b 5 c 6 , if possible.
This is the answer I came up with and I am not sure if it is right.
4a 7b 6c 6(b2 - 2ac)

Click here to see answer by fractalier(6550) About Me 

Question 42921: Factor the expression 11(x + y) - 7 t(x + y).

(11 - 7t)(x + y)
this is what i have come up with.

Click here to see answer by fractalier(6550) About Me 

Question 42903: What values for x must be excluded in the following fraction?

5/x+1

Click here to see answer by fractalier(6550) About Me 

Question 42942: Factor the polynomial completely.
147a%5E4-75b%5E2

Click here to see answer by fractalier(6550) About Me 

Question 42947: Factor by grouping
6x%5E2+%2B+8x+-+9x+-+12

Click here to see answer by fractalier(6550) About Me 

Question 42944: Factor the trinomial completely.
u%5E2-2uv-63v%5E2

Click here to see answer by fractalier(6550) About Me 

Question 42960: When dividing polynomials by synthetic division,
Example:
f^2 + 7f + 10 / f + 2
Is the answer: f^2 + 5f ?
Because I've looked at examples and the first term in the quotient would be one exponent less than the beginning one. Meaning in the answer of the example, instead of putting f^2, it's just f. I'm not sure if you understand what I mean, but if you could show me step by step how to write the quotient. Thank you!

Click here to see answer by aaaaaaaa(138) About Me 

Question 42968: If one-half of one integer is subtracted from three-fifths of the next consecutive integer, the difference is 3. What are the two integers?
Click here to see answer by jmg(22) About Me 

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240, 30241..30285, 30286..30330, 30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045, 36046..36090, 36091..36135, 36136..36180, 36181..36225, 36226..36270, 36271..36315, 36316..36360, 36361..36405, 36406..36450, 36451..36495, 36496..36540, 36541..36585, 36586..36630, 36631..36675, 36676..36720, 36721..36765, 36766..36810, 36811..36855, 36856..36900, 36901..36945, 36946..36990, 36991..37035, 37036..37080, 37081..37125, 37126..37170, 37171..37215, 37216..37260, 37261..37305, 37306..37350, 37351..37395, 37396..37440, 37441..37485, 37486..37530, 37531..37575, 37576..37620, 37621..37665, 37666..37710, 37711..37755, 37756..37800, 37801..37845, 37846..37890, 37891..37935, 37936..37980, 37981..38025, 38026..38070, 38071..38115, 38116..38160, 38161..38205, 38206..38250, 38251..38295, 38296..38340, 38341..38385, 38386..38430, 38431..38475, 38476..38520, 38521..38565, 38566..38610, 38611..38655, 38656..38700, 38701..38745, 38746..38790, 38791..38835, 38836..38880, 38881..38925, 38926..38970, 38971..39015, 39016..39060, 39061..39105