Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 238897: factors of t^4-81
Click here to see answer by Alan3354(69443) About Me 

Question 238974: use the quadratic formula to solve the equation.
x^2-5x=-9
The solution set is

Click here to see answer by Edwin McCravy(20054) About Me 

Question 239003: Winter Wheat question: WHile finding the amount of seed needed to plant his three square wheat fields, Hank observed that the side of one field was 1 Kilometer longer than the side of the smallest field and that the side of the largest field was 3 kilometer longer than the side of the smallest field. If the total area of the three fields is 38 square kilometers, then what is the area of each field?
x^2+(x+1)^2=(x+3)^2=38
Used the foil method to solve (x+1)(x+1) and (x+3)(x+3)
x^2+x^2+2x+1+x^2+6x+9=38
3x^2+8x+10=38
3x^2+8x-28=0
I know this is wrong because I can't solve.
Any suggestions?

Click here to see answer by scott8148(6628) About Me 

Question 239007: Venture Capital:
Henry invested $12000 in a new resturant. When the resturant was sold two years later, he received $27000. Find the average annual return by solving the equation 12,000(1+r)^2=27000.
used the foil to solve the (1+r)^2 or (1+r)(1+r)
12000(1+2r+r^2)=27000
12000+24,000r+12000r^2=27000
-15000+24,000r+1200r^2=0
THis is as far as I could get. Not sure my next step.

Click here to see answer by scott8148(6628) About Me 

Question 239234: A flagpole is secured on opposite sides by two guy wires, each of which is 5 ft. longer than the pole. The distance between the points where the wires are fixed to the ground is equal to the length of one guy wire. How tall is the flagpole (to the nearest inch)?
Click here to see answer by Photonjohn(42) About Me 

Question 239537: Please explain how to find the difference between 3,695 and 1,486?
Click here to see answer by Alan3354(69443) About Me 

Question 239625: what is the closet integer to 4,000 I said 2,000 am I right
Click here to see answer by stanbon(75887) About Me 

Question 239736: How would I find the real-number solutions of the equation: x^3-3x=0
Click here to see answer by Theo(13342) About Me 

Question 239793: hi sir. how we can make equation from word problems
Click here to see answer by College Student(505) About Me 

Question 239988: Doing a quadratic equation problem, i cam across a problem. the equation i got was x^2-6c-3=0. When plugging this problem into the equation, x=-b+/-(sqrt(b^2+4ac))/2a, I did not know if you could plug the b value (-3) into the place of -b or if you had to make it a positive b.
Click here to see answer by JimboP1977(311) About Me 
Question 239988: Doing a quadratic equation problem, i cam across a problem. the equation i got was x^2-6c-3=0. When plugging this problem into the equation, x=-b+/-(sqrt(b^2+4ac))/2a, I did not know if you could plug the b value (-3) into the place of -b or if you had to make it a positive b.
Click here to see answer by solver91311(24713) About Me 

Question 239994: 3x^2-5x+4=0
Click here to see answer by JimboP1977(311) About Me 

Question 240171: determine how long the cannon ball was in the air.
using h=-5t(squared)+ 40t+ 3

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

Question 240118: 3x^2-14x+8=0
Click here to see answer by philline_palana(20) About Me 

Question 240082: 3x^2=2x+2

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

Question 239701: use the discriminate to find the number and type of solutions to the following quadratic equation x^2+2x+6=0 i got the answer of -20 i just don't know if it's 2 real solutions, 2 imaginary solutions or 1 real solution.
Click here to see answer by philline_palana(20) About Me 

Question 240199: Evaluate each given value of the function f(x) if f(x) =6-2x
Find f(0)
Find f(-2)

Click here to see answer by solver91311(24713) About Me 

Question 239651: What happens when b=0 in the quadratic x^2+bx+c=0?
Click here to see answer by College Student(505) About Me 

Question 240240: i need the formula for how to find the equation of a curved line graph eg y=_xsquared +_x + _
Click here to see answer by Theo(13342) About Me 

Question 240299: x to the 2 power- 3 - 3/4 = 0
a) solve by completing the square
b) solve using the quadratic formula
(x to the 2 power minus x minus three-fourths equal 0.

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

Question 240431: if a rectangle has an area of 117cm2 and a perimeter of 44cm what is it's length and breadth
Click here to see answer by stanbon(75887) About Me 
Question 240431: if a rectangle has an area of 117cm2 and a perimeter of 44cm what is it's length and breadth
Click here to see answer by checkley77(12844) About Me 

Question 240438: What is the values of x in the equation y=x(5x+1)
Click here to see answer by JimboP1977(311) About Me 

Question 240471: A rectangular garden is 20 ft longer than it is wide. Its area is 2925 . What are its dimensions?
Click here to see answer by solver91311(24713) About Me 

Question 240464: do you now gow to write an equation of a parabola with a max value of 4 when x is 1 and one x intercept at 2... help with this specific and ones similar to it please
Click here to see answer by stanbon(75887) About Me 

Question 240473: A rectangular garden is 20 ft longer than it is wide. Its area is 2925 . What are its dimensions?
Click here to see answer by solver91311(24713) About Me 
Question 240473: A rectangular garden is 20 ft longer than it is wide. Its area is 2925 . What are its dimensions?
Click here to see answer by checkley77(12844) About Me 

Question 240469: a farmer with 4000 meters of fencing wants to encloce a rectangular plot that borders on a river.
*if the farmer does not fence the side along the river, what is the largest area that can be enclosed?
*provide the area function used and graph it. Identify the maximum and interpret what it means.

Click here to see answer by checkley77(12844) About Me 

Question 240509: -9t + 2 =56
Click here to see answer by College Student(505) About Me 

Question 240648: How do you find the turning point (vertex) of a Quadratic function, not using complete the square?
Click here to see answer by rapaljer(4671) About Me 

Question 240628: x^2-5x+35=0
it has no real solutions but what would be the irrational solution?

Click here to see answer by jsmallt9(3758) About Me 

Question 240581: The problem is: (x+5)/3 + 4/x = 5/6 My instructions are to use the quadratic formula to solve. I think I am supposed to multiply by the common denominator, but I am not sure.
Click here to see answer by jsmallt9(3758) About Me 

Question 240777: Let f(x)=3x^2-8x. find a such that f(a)=-5.
Click here to see answer by jsmallt9(3758) About Me 

Question 240797: I need to a step by step solving this equation:0= x^2+15x-1350 , This is from a word problem using quadratic equation solving cost per person.... I know the answer but I do not know how they got it....help please
Click here to see answer by vleith(2983) About Me 

Question 240789: Hello,
I need some help to:

1. Solve the following equation using quadratic formula
2x^2-3x-1=0
The solution set is? ________

Thanks!!

Click here to see answer by vleith(2983) About Me 

Question 240344: A horse breeder wants to construct a corral next to his horse barn that is 50 feet long, using all of the barn as one side of the corral. He has 250 feet of fencing available and wants to use all of it. What is the maximum area of the corral?
There's a picture of it here: http://math.library.wisc.edu/reserves/114/114-nenciu-09spex01.pdf (question #5)
Help? I'm so confused!

Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 240809: x^2-4x-12=0
Click here to see answer by JimboP1977(311) About Me 

Question 240782: The pitch P of a musical tone varies inversely as its wavelength W. One tone has a pitch of 283 vibrations per second and a wavelength of 12 ft. Fine the wavelength of another tone that has a pitch of 348 vibrations per second.
Click here to see answer by Alan3354(69443) About Me 

Question 240861: Use the quadratic equation to solve the equation:
-2.8x= -3.8x^=1.4
Please help me with this, I get stuck everytime when it comes to simplifying and finishing the problem. Thank you so much!

Click here to see answer by checkley77(12844) About Me 

Question 240880: I got this reply back for my question....I can't find an answer unless I am doing something wrong. Thanks for checking into it for me!
Question 240789: Hello,
I need some help to:
1. Solve the following equation using quadratic formula
2x^2-3x-1=0
The solution set is? ________
Thanks!!
Answer by vleith(1971) About Me (Show Source):

Click here to see answer by Alan3354(69443) About Me 

Question 240910: x^4+10x^2+9=0
solve as quadratic function?
my assumption is
x^2=-1 and x^2=-9
which there is no real solution but i dont think i am right

Click here to see answer by Earlsdon(6294) About Me 

Question 240936: How do you solve the following quadratic equations:
-6(u+5)^2=120

3s^2-1=7s^2

Click here to see answer by stanbon(75887) About Me 
Question 240936: How do you solve the following quadratic equations:
-6(u+5)^2=120

3s^2-1=7s^2

Click here to see answer by edjones(8007) About Me 

Question 240893: Determine the maximum area of a triangle, in square centimeters, if the sum of its base and its height is 10 cm.
Click here to see answer by checkley77(12844) About Me 

Question 240939: Polynomials
(y^3)^2

Please help me
Thank you

Click here to see answer by edjones(8007) 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, 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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, 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