Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 219414: how can we know if the graph of quadratic equation opens?
a. upward
b. downward
c. to the left
d. to the right

Click here to see answer by Theo(13342)

Question 219487: 3x^4+13x^2-10=0

Click here to see answer by Alan3354(69443)

Question 219498: What is the answer of the following problem?
2 + (3/(2+(3/(2+(3/(2+..).))))) =
Thank you for your help
Click here to see answer by jim_thompson5910(35256)

Question 219573: 4x� + 19x + 21 = 0
x= ?
x= ?
Click here to see answer by jim_thompson5910(35256)

Question 219646: Hello I was wondering if you could help me answer this problem.
converting to vertex form
y=3x^2-36x-117
thank you for your help :)
Click here to see answer by jim_thompson5910(35256)

Question 219697: -5(w-4)
Click here to see answer by user_dude2008(1862)

Question 219711: 2(7-v)-3v
Click here to see answer by checkley77(12844)

Question 220170: Solve for s.
s^2 - 7s + 10 = 0

a. (2,5)
b. (-2,-5)
c. (-1,10)
d. (10,1)
Click here to see answer by checkley77(12844)

Question 220173: Identify the coefficients that would be used in the quadratic formula for this equation. 5x^2 = 4x
a. a = 5, b = 4, c = 1
b. a = -5, b = 4, c = 0
c. a = 5, b = 4, c = 0
d. a = 5, b = -4, c = 0
Click here to see answer by Theo(13342)

Question 220168: Identify the coefficients that would be used in the quadratic formula for this equation. 5x^2 = 4x
a. a = 5, b = 4, c = 0
b. a = -5, b = 4, c = 0
c. a = 5, b = -4, c = 0
d. a = 5, b = 4, c = 1
Click here to see answer by solver91311(24713)

Question 220175: Find the solution set for N.
6n^2 + 13n + 6 = 0
a. (2/3, 3/2)
b. (2/3, -3/2)
c. (-2/3, -3/2)
d. (-2/3, 3/2)
Click here to see answer by jim_thompson5910(35256)

Question 220190: Solve c^2 - 144 = 0.

a. (-12)
b. (0,12)
c. (12)
d. (12,-12)
Click here to see answer by rfer(16322)

Question 220609: 3x^2-21x=-18
Click here to see answer by chibisan(131)

Question 220620: How to slove this Quadratic equation by completing the square: x^2+4x-8=0
Click here to see answer by rapaljer(4671)

Question 220664: Is -4x squared = 0 a quadratic equation? I am supposed to solve each quadratic equation using any technique, name the technique, and check. But I do not think this is a quadratic equation because it is not written in a form of y = ax squared + bx + c. I think to solve x would equal 0. Am I right or do I totally not understand?
Click here to see answer by stanbon(75887)

Question 220641: Sammy spends 10 Euros on some cans of drink. In another shop she sees that the same cans are each 10 cents cheaper, and she calculates that she could have brought 5 more cans for the same money. How many cans did she buy?
Click here to see answer by josmiceli(19441)

Question 220607: (x+2)^2=-16
Click here to see answer by tutor_paul(519)

Question 220696: I need help with a quadratic Equation 2x^2=90
How do i use the quadratic formula if there is no middle term?
Thank you

Click here to see answer by tutor_paul(519)

Question 220696: I need help with a quadratic Equation 2x^2=90
How do i use the quadratic formula if there is no middle term?
Thank you

Click here to see answer by jim_thompson5910(35256)

Question 220887: I don't understand how to use the formula of ax^+bx+c=0
My problem is this x^2+7x=180
I need x answered
Click here to see answer by edjones(8007)

Question 220887: I don't understand how to use the formula of ax^+bx+c=0
My problem is this x^2+7x=180
I need x answered
Click here to see answer by josmiceli(19441)

Question 220954: hi, i need help in solving an equation using the quadratic formula,
i know what the quadratic formula is but i don't know how to apply it to this particular question
the question is: 2x^2+7x = 1-2x^2
the fact that it isn't in the form x^2 + bx + c = 0 is making it hard for me solve,
at the moment i've got as far as changing the equation to 2x^2+7x - 1-2x^2=0
but i don't know whether thats right or wrong :S
thank you!
Click here to see answer by ankor@dixie-net.com(22740)

Question 220965: HAVING PROBLEMS SOLVING QUADRATIC EQUATIONS INVOLVING FRACTIONS E.G
4 OVER 2X-3 - 2 OVER X = 1 OVER NINE.
THANKS FOR YOUR HELP

Click here to see answer by drj(1380)

Question 220979: what is mode?
Click here to see answer by likaaka(51)

Question 220955: 45,000= 150r + 250s
Click here to see answer by Alan3354(69443)

Question 220988: which of the following is the greates common factor of the terms 48s5t3u2 and 40s3tu4
Click here to see answer by checkley77(12844)

Question 221042: What is the value of x when it's 4x squared + 8x + 4 = O? Can you show me how to solve it without using the quadratic formula?
Click here to see answer by jim_thompson5910(35256)

Question 221214: Suppose that X represents one of two positive numbers whose sum is 50. Determine a function F that represents the product of these two numbers. For what two such numbers is the product equal to 400?
Click here to see answer by RAY100(1637)

Question 221094: How can I figure out my a,b,and c values from the following expression?
.850=[(x)/(1-x)(2-x)]

THANK YOU!!
Click here to see answer by sofiyac(983)

Question 221267: Please help me solve this equation
5/7-3 = y+7/2y-6 +1
My solution:
LCD of y-3 y-3(5/y-3)=y-3(y+7/2y-6)
=5*y+7/4
= 12/4
= 3
Click here to see answer by checkley77(12844)

Question 221303: can u solve this problem
factorise
15+15x-20x^2
Click here to see answer by drj(1380)

Question 221378: Find the vertex, the line of symmetry, and the maximum or minimum value of f(x).
f(x)=-(x+8)^2-7
The vertex =
The line of symmetry =
The minimum or maximum value=
Is this maximum or minimum?
Thank you!
Click here to see answer by likaaka(51)

Question 221447: Solve for x. x^2+45=6x
Thank you!
Click here to see answer by checkley77(12844)

Question 221447: Solve for x. x^2+45=6x
Thank you!
Click here to see answer by likaaka(51)

Question 221453: Give exact and approximate solutions to three decimal places. x^2-5x+5=0. Find the x-intercepts.
What are the solutions?
What are the x-intercepts?
Thank you!
Click here to see answer by jim_thompson5910(35256)

Question 221485: Determine the nature of the solutions of the equation x^2-18=0. Does it have 1 solution, 2 imaginary solutions, or 2 real solutions?
Thank you!
Click here to see answer by user_dude2008(1862)

Question 221483: Determine the nature of the solutions of the equation. y^2=(1/5)y+(2/3); does it have 2 real solutions, 2 nonreal solutions, or 1 real solution?
Thank you!
Click here to see answer by user_dude2008(1862)

Question 221482: Give exact and approximate solutions to three decimal places.
y^2-4y+4=9
Thank you!
Click here to see answer by jim_thompson5910(35256)

Question 221482: Give exact and approximate solutions to three decimal places.
y^2-4y+4=9
Thank you!
Click here to see answer by RAY100(1637)

Question 221480: Find and label the vertex and the line of symmetry. Graph the function -3(x+3)2
Thank you!
Click here to see answer by user_dude2008(1862)

Question 221511: give exact and approximate solutions to three decimal places

x^2+5x-3=0
Click here to see answer by jim_thompson5910(35256)

Question 221522: Find and label the vertex and the line of symmetry.
f(x)=(1/5)x^2
Vertex= _______
Line of Symmetry = ________
THANKS
Click here to see answer by user_dude2008(1862)

Question 221522: Find and label the vertex and the line of symmetry.
f(x)=(1/5)x^2
Vertex= _______
Line of Symmetry = ________
THANKS
Click here to see answer by stanbon(75887)

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