Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 689954: The graph of y = �2x2 + 15x + c contains (3, 89). Find the value of c.
Click here to see answer by Stitch(470)

Question 689998: x^2+8x+12=0
Click here to see answer by jim_thompson5910(35256)

Question 690023: x^2+10x=-25
Click here to see answer by jim_thompson5910(35256)

Question 690020: What is the vertex in the quadratic equation x2 + 8x + 7 = y?
Input your answer in the form: (x, y)
Click here to see answer by stanbon(75887)

Question 690016: #1. 4w^2 - 25 = 0

#2 3/4x^2 - 2x + 1/2 = 0

I need help solving by factoring and using the quadratic formula which I am having a hard time understanding so far. I would like a clear visual of the steps to know whats going on if possible.
Click here to see answer by josmiceli(19441)

Question 690097: Find the discriminant of the function f(x) = 2x^2 - 6x - 3 and determine how many roots the function has.
Click here to see answer by Alan3354(69443)

Question 690097: Find the discriminant of the function f(x) = 2x^2 - 6x - 3 and determine how many roots the function has.
Click here to see answer by josmiceli(19441)

Question 690252: How would i solve this equation in radical and decimal form 2n^2-11n-76=0?
Click here to see answer by ReadingBoosters(3246)

Question 690347: create equation from data points (0,1) (1,4) (2,16) (3,64) (4,256)?
Click here to see answer by stanbon(75887)

Question 690482: 4w^2 - 25 = 0 Solve by factoring and quadratic equation?
Click here to see answer by checkley79(3341)

Question 690705: How to find the leading coefficient of f(x)=3x^2+5-x^2 radical 5.
Click here to see answer by fcabanski(1391)

Question 691039: please find the quadratic equation whose roots are -2 and 5.thanks!
Click here to see answer by vleith(2983)

Question 690879: please help me with finding the y intercept for this equation
y=-9.8^2+100
Click here to see answer by ankor@dixie-net.com(22740)

Question 691053: could you please help me with this question? how long does it take a ball to reach maximum height with the formula where h= height and t=seconds
Click here to see answer by ankor@dixie-net.com(22740)

Question 691285: A frog leaps 2 feet horizontally. The highest point in the jump is foot. Assume the frog starts at (0, 0). What quadratic function models the path of the jump?
Click here to see answer by Alan3354(69443)

Question 691340: An object is thrown straight upward from the ground with an initial speed of 30 feet per second. Its height (h) after t seconds is given by the equation h(t) =
-5t2 + 30t. Find the domain for h(t).
A. (-∞, 0)
B. (6, ∞)
C. (0, 6)
D. All real numbers

Click here to see answer by stanbon(75887)

Question 691361: What is the answer to x squared minus 7x equal to 5 using quadratic formula?
Click here to see answer by jsmallt9(3758)

Question 691577: A ball is thrown vertically upward with an intial velocity of 96 feet per second. The distance s (in feet) of the ball from the ground after t seconds is s(t) = 96t-16t^2
a. At what time will the ball strike the ground?
b. For what time t is the ball more than 128 feet above the ground?
c. When will the ball reach its highest peak? How high is it above the ground?
Click here to see answer by Alan3354(69443)

Question 691625: Find the vertex of the parabola
fx=x^2-6x-2
Click here to see answer by nerdybill(7384)

Question 691732: Write an equation of the form f(x)=ax^2+bx+c in which f(0)= -6 f(2)= -3 and f(4)=2
I found out that c is -6, I tried using the sum and product of roots but I can't figure it out, please help?
Click here to see answer by sachi(548)

Question 691919: The sum of the squares of three consecutive integers is 2189 . Find the intergers? Please help
Click here to see answer by Alan3354(69443)

Question 692037: The U.S. trade deficit in billions of dollars for the years 1997,1998,1999 can be computed by
f(x)=16x^2-63,861x+63,722,378
Where X is the year. In which year was the trade deficit 164 billion?
Click here to see answer by josmiceli(19441)

Question 692550: I need help (step by step) answering how to solve "0=2x^2+7x+3" using quadratic formula.
Click here to see answer by Alan3354(69443)

Question 692966: Q=L(2+r)^2 for r
Click here to see answer by jim_thompson5910(35256)

Question 692969: solve by substituting. x^-2-6x^-1=-4. hint: u=x^-1
Click here to see answer by jim_thompson5910(35256)

Question 693127: When the dimensions of a cube are reduced by 4 inches on each side, the surface area of the cube is 864 square inches. What were the demensions of the original cube?
Click here to see answer by stanbon(75887)

Question 693177: Rewrite the equation in slope intercept form: 2/3x+y-9=0
Click here to see answer by stanbon(75887)

Question 693203: How do I factor this equation? 7x squared - 60x + 32 = 0
Click here to see answer by jim_thompson5910(35256)

Question 693410: Finding finding the roots of a quadratic equation with leading coefficient greater than 1
Solve for u
3u^2-5u=2
Click here to see answer by pmatei(79)

Question 693596: -4x^2+14x-6=0 solve for the zeros
Click here to see answer by mouk(232)

Question 693630: 4(x-3)=x(x+1)
Click here to see answer by ReadingBoosters(3246)

Question 693677: constructing a quadratic equation whose solutions are -5 and 7.
Click here to see answer by ReadingBoosters(3246)

Question 693848: URGENT CAN SOMEONE HELP ME ON THIS PROBLEM
BY COMPLETING THE SQUARE
5x^2-2x=7
Click here to see answer by Alan3354(69443)

Question 693848: URGENT CAN SOMEONE HELP ME ON THIS PROBLEM
BY COMPLETING THE SQUARE
5x^2-2x=7
Click here to see answer by mouk(232)

Question 693945: Determine whetee a quadratic model exists for eaxh set of values. If so write the model.
(-4, 3), (-3, 3) (-2, 4)
Click here to see answer by stanbon(75887)

Question 693928: Simplify this quadratic answer
9+-√693 /3
( Just restating it incase it was hard to read ) 9 plus or minus the square root of 693 divided by 3
Click here to see answer by KMST(5328)

Question 694122: what times what= 3 but also
adds up to -4
Click here to see answer by jim_thompson5910(35256)

Question 694122: what times what= 3 but also
adds up to -4
Click here to see answer by rfer(16322)

Question 694167: area of a rectangle: A=LW
The are of this rectangle is 39 square units. Find its length (the horizontal side ) and width (the vertical side)
length)x+5
width) x-5
a) write an equation using the formula and the given information.
39=? (do not multiply)
b) solve the equation, giving only the solution(s) that make sense in the problem. The solution for x is ?
c) use the solution to find the indicated dimensions of the figure.
Length=? Width=?
Click here to see answer by ShaunaJS(1)

Question 694280: Show how to solve 8x^2+14x+5=0.
Thank You

Click here to see answer by htmentor(1343)

Question 694354: Please help me solve this equation: 3x^2 - 9x + 1 = 0
Click here to see answer by MathLover1(20849)

Question 694404: Solve. Round results to the nearest thousandth.
2x^2+3x-7=0
Click here to see answer by Ave(106)

Question 694404: Solve. Round results to the nearest thousandth.
2x^2+3x-7=0
Click here to see answer by Waleak(2)

Question 694426: X^4-3x^2-54=0
Click here to see answer by Ave(106)

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