Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 248863: Write standard form and identify a, b, and c.
4x^2 + 4 = 2x + 3
Click here to see answer by tutorcecilia(2152)

Question 248863: Write standard form and identify a, b, and c.
4x^2 + 4 = 2x + 3
Click here to see answer by Alan3354(69443)

Question 249015: y= 4x squared +16x+7
Click here to see answer by dabanfield(803)

Question 248981: 10x2 - 19x +6
Click here to see answer by edjones(8007)

Question 248967: I have two problems that I would love some help on. I am so confused.
Solve for x: 4x^2 = - 25x - 25

Solve by completing the square: m^2 - 49/2m = 1/2
Thank you in advance!!
Click here to see answer by edjones(8007)

Question 249184:
Click here to see answer by mathitutor(25)

Question 249182: Calculate the discriminant of 9x^2+5x-11=0

This is what I already tried:
5x^2-4(9)(-11)
25-4(9)(-11)
25-396
-371
Click here to see answer by Alan3354(69443)

Question 249211: Write a Quadratic Function having the given solutions:6,-2.
Click here to see answer by ankor@dixie-net.com(22740)

Question 249326: If one side of a square is increased by 2 inches and an adjacent side is decreased by 2 inches, the area of the resulting rectangle is 32 square inches. Find one side of the square.
Click here to see answer by checkley77(12844)

Question 249348: the length of a rectangle is three times its width. if the width is diminished by 1 inch and the length is increased by 3 inches, the area of the new rectangle is 72 square inches. find the dimensions of the original rectangle.
Click here to see answer by checkley77(12844)

Question 249368: okay so it says factor completely and it is 2x^3+40x^2+220x . I'm so confused about the cubing part of it, I've never seen it before. I've only factored squared numbers. Can you please help me and show work so i can understand it better? thank you! ;)
Click here to see answer by checkley77(12844)

Question 249359: please factor completely and explain! im so confused! the question says factor completely --> 3x^3+39x^2+120x help!
Click here to see answer by scott8148(6628)

Question 249371: Solve the equation.
x(x - 3) = 40
Click here to see answer by richwmiller(17219)

Question 249381: Harry's garden is 6 yards long and 4 feet wide. He wishes to double the area of his garden by increasing its length and width by the same amount. Find the number of yards by which each dimension must be increased.
Click here to see answer by richwmiller(17219)

Question 249378: a rectangle is 8 feet long and 6 feet wide. if each dimension is increased by the same number of feet, a new rectangle is formed whose area exceeds the area if the original rectangle by 72 square feet. find the dimensions of the new rectangle.
Click here to see answer by richwmiller(17219)

Question 249403: The diagonal of a television set is 52 inches long. Its length is 28 inches more than its height. Find the dimensions of the television set.
Click here to see answer by user_dude2008(1862)

Question 249377: a rectangle is 6 feet long and 4 feet wide. if each dimension is increased by the same number of feet, a new rectangle is formed whose area is 39 square feet more then the area of the original rectangele. by how many feet was each dimension increased?
Click here to see answer by checkley77(12844)

Question 249505: solve for y.
8x+5y=40
Click here to see answer by edjones(8007)

Question 249606: Graph the quadratic equation.
y= x^2 + x - 2
Click here to see answer by checkley77(12844)

Question 249603: (y+5)(y-1)=27
Click here to see answer by checkley77(12844)

Question 249599: A square mirror has sides measuring 2 ft. less than the sides of a square painting. If the difference between their areas is 32 ft.^2, find the lengths of the sides of the mirror and the painting.
Click here to see answer by checkley77(12844)

Question 249662: y = ax^2 + bx + c
Click here to see answer by richwmiller(17219)

Question 249634: The length of a rectangle is 1cm more than twice the width. If the area is 78cm (squared). Find the dimensions. I came up with this so far?
L=2w +1
2w+1(w)=78
2w(squared)+w=78 then
2w(squared)+w - 78 = 0
I factored that as (2w + 13) and (2w - 6) = 0
But then I would be getting W = -13/2 and W = 6
Am I on the right track? I'm supposed to be finding the dimensions of the rectangle.
Thanks
Click here to see answer by richwmiller(17219)

Question 249718: A ball is thrown into the air with an upward velocity of 36 ft/s. Its height h in feet after t seconds is given by the function h = �16t2 + 36t + 9.
a. In how many seconds does the ball reach its maximum height? Round to the nearest hundredth if necessary.
b. What is the ball's maximum height?
Click here to see answer by solver91311(24713)

Question 249876: Evaluate the polynomial for the indicated value of the variable.
-4x3 + 2x2 + 5x � 7 when x = -2
Click here to see answer by solver91311(24713)

Question 249999: a^2-11a+28=0
Click here to see answer by mathitutor(25)

Question 249936: hey!
can you please help me with my homework??
The world's largest hedge maze is in the grounds of an English country house known as Longleat. The rectangle maze has 2.7 km of paths flanked by 16,180 yew trees. The length of the rectangle is 50m more than the width. The area of the rectagle is 6496m(squared). What are the dimensions of the rectangle?
please help me! THANK YOU!
Click here to see answer by ankor@dixie-net.com(22740)

Question 249938: x^2-8x+15=0
how do you solve this problem, and how do you use the discriminant?
Click here to see answer by checkley77(12844)

Question 250166: What solution would you get from 2 and 3 when doing a quadratic equation.
Click here to see answer by solver91311(24713)

Question 250248: sqrt4+10 wrote in a+bi form
Click here to see answer by Alan3354(69443)

Question 250335: Please give co-ordinates of the vertex and sketch graph.
y=x^2+2x+4
Would you show me how it's figured?
Click here to see answer by richwmiller(17219)

Question 250334: How do you graph this equadratic equation by plotting points?
y=(x-5)^2
Click here to see answer by checkley77(12844)

Question 250467: (4x-2)^2=8
Click here to see answer by jim_thompson5910(35256)

Question 249908: (6x3 � 11x2 + 11x � 2) / (2x � 3)
Find the quotient of the polynomials
Click here to see answer by jsmallt9(3758)

Question 250483: 2x squared =22

Click here to see answer by MRperkins(300)

Question 250531: If I already am given the solution of 3, -4, then how do I turn these numbers into a quadratic equation?
Click here to see answer by MRperkins(300)

Question 250564: Graph the quadratic equation
y= -x^2 - 4x - 3
Click here to see answer by richwmiller(17219)

Question 250602: Graph the quadratic equation
y = x^2 + 8x + 7
Click here to see answer by richwmiller(17219)

Question 250586: solving quadratic equations by factoring
x^2 - 8x - 48 = 0

Click here to see answer by richwmiller(17219)

Question 250580: Graph the quadratic equation
y = x^2 + 8x + 7
Click here to see answer by Fombitz(32388)

Question 250611: y = -x^2 + 7x - 2
I need to graph this quadratic function.
I know I will need to use -b/2a and find y, but I am quite confused on how to solve this problem.
Click here to see answer by Fombitz(32388)

Question 250613: y = -x^2 + 7x - 2
I need to graph this quadratic function.
I know I will need to use -b/2a and find y, but I am quite confused on how to solve this problem.
Click here to see answer by Fombitz(32388)

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