Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 450405: Factor the polynomial by grouping the terms together two at a time.
x3 - 6x2 - 4x + 24
Please show me the steps to get the answer. Thanks
Click here to see answer by robertb(5830)

Question 451074: Please Help
express f(x) in the form a(x-h)^2 +k.
f(x)= -x^2-4x-8
Thank You!!!
Click here to see answer by robertb(5830)

Question 451105: x^2+x=12
Click here to see answer by stanbon(75887)

Question 451111: 10x^2= -100x
Please tell me how to solve this problem by factoring and doing 2 checks.
Thanks. SAL
I think the answer is x=0, x= -10. But, how do you do it?
Click here to see answer by Gogonati(855)

Question 451144: Determine the nature of the solutions of the equation 10t^2 - 8t = 0.
2) give exact and approximate solutions to thee decimal places x^2+2x+1=4
3) solve by copleting the square x^2+13/2x=13
4) give exact and approximate solutions to three decimal places (x-5)^2=18
Thank you,
Click here to see answer by ewatrrr(24785)

Question 451301: Hi! I was trying to solve this problem for quadratic equation: but in order to simplify it I get stuck on the part during the equation that looks like this (the + sign in the equation represents the + or - one in the actual equation: . I know that the square root of a negative number is (square root of the number as if it were positive) x i(the square root of - 1). I also know that there will be 2 solutions to this equation. But what do I do after if I need to simplify it as much as possible? Thanks for any help you may give me!
Click here to see answer by jim_thompson5910(35256)

Question 451389: How much of a 5% acid solution and a 20% acid solution must be mixed inorder to obtain 3 gallons of a 10% acid solution? I got the answer 2 gallons of 5% and 1 gallon of 10% but I don't know why.
Please show me step by step to get the answer. Thanks
Click here to see answer by jorel1380(3719)

Question 451392: Graph the line 5x+2y=15

I got the answer (0,15/2) and (3,0) but I don't know why.
Please show me step by step to get the answer. Thanks
Click here to see answer by rwm(914)

Question 451399: Simplify and leave with positive exponents: (2wy^-3)^4 / 4y^-2
I got the answer 4w^4 / (y^10) but I don't know why.
Please show me step by step to get the answer. Thanks
Click here to see answer by rwm(914)

Question 451385: Solve: 9-3(2x-5)=4x-6 I got the answer 3 but I don't know why.
Please show me step by step to get the answer. Thanks
Click here to see answer by pedjajov(51)

Question 4812: why do you factor a quadratic equation before you solve?
Click here to see answer by robertb(5830)

Question 451458: 2x^+5x+2=
I was doing fine with equations without the first variable was added - but now that there's a 2x^ I'm a bit stumpted - please help with this one and I can figure the rest of them out

Click here to see answer by confusedgirl81(14)

Question 451609: Use Tickests=-0.2x^2+12x+11 to determin the last day that tickets will be sold.
Click here to see answer by nerdybill(7384)

Question 451608: Using equation Tickets=-0.2x^2+12x+11 describe what happens to ticket sales as the time passes?
Click here to see answer by ewatrrr(24785)

Question 451701: Solve: SQRE ROOT x-5=x-5
I got the answer (5,6) but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by jorel1380(3719)

Question 451701: Solve: SQRE ROOT x-5=x-5
I got the answer (5,6) but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by Alan3354(69443)

Question 451703: Divide: 6x^2y^2-4xy / 2xy
I got the answer 3xy-2 but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by jorel1380(3719)

Question 451705: Factor completely: a^4-1
I got the answer (a^2+1)(a+1)(a-1) but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by jorel1380(3719)

Question 451706: Factor: x^3-8
I got the answer (x-2)(x^2+2x+4) but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by Alan3354(69443)

Question 451706: Factor: x^3-8
I got the answer (x-2)(x^2+2x+4) but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by solver91311(24713)

Question 451707: Simplify as much as possible: SQRE ROOT 27+ 2 SQRE ROOT12 + SQRE ROOT 3
I got the answer 8 SQRE ROOTs 3 but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by ewatrrr(24785)

Question 451697: Find equation of line passing through the point (5,-2) and (-3,4)
I got the answer y=(-3/4)x+7/4 but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by nerdybill(7384)

Question 451698: Simplify and leave with positive exponents: (2wy^-3)^4 / 4y^-2
I got the answer 4w^4 / (y^10) but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by ewatrrr(24785)

Question 451704: Divide: x^2+5x+7 / x+3
I got the answer x+2+ 1/x+3 but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by MathLover1(20849)

Question 451700: Subtract and Simplify: 8/x^2-3x - 2x-4/x^2-9x+18
I got the answer -2x^2+12x-48 / x(x-3)(x-6) but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by ewatrrr(24785)

Question 451729: Hi! This is a fairly simple question: how much can you simplify in this problem using i (square root of - 1): The original problem was Thanks
Click here to see answer by nerdybill(7384)

Question 451740: Solve by factoring and using principle of zero products:
n^2+11n+18=0

Click here to see answer by benn143(2)

Question 451740: Solve by factoring and using principle of zero products:
n^2+11n+18=0

Click here to see answer by ewatrrr(24785)

Question 451727: if a model rocket was measured by the vertical motion model h=-16t2+96t, how many seconds would it take for the model rocket to reach 80 feet for the second time?
My math teacher asked a similar vertical motion question and if i see this one worked out i might understand it better.
Click here to see answer by benn143(2)

Question 451746: f(x)=-8squared+8x+7
Click here to see answer by stanbon(75887)

Question 451746: f(x)=-8squared+8x+7
Click here to see answer by solver91311(24713)

Question 451870: the perimeter of a rectangle is 36 cm. the area is 80 cm squared. find the length and width.

i know the answers i just need how to get them. this is part of my area math packet. please help!
Click here to see answer by jorel1380(3719)

Question 451965: There are Four different methods of solving a quadratic equation; factoring, the square root property, completing the square, and the quadratic formula. Explain under what circumstances each method would be preferred over any of the other methods. Give an example for each circumstance.
Click here to see answer by richard1234(7193)

Question 451702: Multiply and Simplify (11x+30y^2)
I got the answer 121x^2+660xy+900y^2 but I don't know how
Please show me step by step to get the answer. thanks
Click here to see answer by richard1234(7193)

Question 451998: Hi. I need help with the equation below. I have no idea where to begin. This is the quadratic equations from India.

Click here to see answer by stanbon(75887)

Question 451993: Hi
I did this equation and got the following answers. Can you please explain what my answers mean?
Actual Graph of y = 12x2-146x+328
x = 9.19357626775359, 2.97309039891308
12x2-146x+328 = 12(x-9.19357626775359)(x-2.97309039891308)
Click here to see answer by stanbon(75887)

Question 452046: The line y=2x-k passes through the point (4,0)
work out the value of k
Click here to see answer by nerdybill(7384)

Question 452083: Please help me solve this equation: Faith and Charity are sister who share a room. Faith takes 45 mins to clean their room alone, while Charity takes an hour. How long would it take them to clean their room together?
Click here to see answer by solver91311(24713)

Question 452095: Evaluate each:
a) 2sin30/3cos45
b) (sin210 - 2sin(5pi/4)/ cos150
c) (sin(-pi/4)) / (2cos(-pi) - sec(pi/6))
d) (tan(pi/2) )/ (csc(pi/6))
e) tan3pi + cos(-pi/6)
f) (sin315)/(4cos210 + 3sin(-330)
PLEASE HELP (:
Click here to see answer by solver91311(24713)

Question 452115: Factor x^3-8
I got the answer (x-2)(x^2+2x+4) but i don't know how
Please show me step by steps to get the answer. Thanks
Click here to see answer by solver91311(24713)

Question 452114: Divide: x^2+5x+7 / x+3
I got the answer x+2 + 1/x+3 but i don't know how
Please show me step by steps to get the answer. Thanks
Click here to see answer by solver91311(24713)

Question 452113: Simplify and leave with positive exponents: (2wy^-3)^4 / 4y^-2
I got the answer 4w^4 / y^10 but i know how especially y^10
Please show me step by steps to get the answer. Thanks
Click here to see answer by stanbon(75887)

Question 452149: what is the y-coordinate of the y-intercept of y=-9x^2+5x-7
Click here to see answer by nerdybill(7384)

Question 452241: State whether the following equation represents a linear, quadratic or exponential function. y=x^0.2 I think Exponential but there is a multiple choice answer that says "none of these" so I am not %100 sure.
Click here to see answer by stanbon(75887)

Question 452304: X2 + 6X + 15 = 0
Show how this equation has no solution?
Click here to see answer by Alan3354(69443)

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, 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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, 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