Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 2756: What is r when the problem is 10rSQUARED-96r-40. Can you please show all your steps so I can see how you did it?
Click here to see answer by gsmani_iyer(180)

Question 2763: can you please tell me a real life example of when a parabola is used? or please give me some websites that have this information..im having trouble finding any sources. thank you
Click here to see answer by longjonsilver(2297)

Question 2820: What is the axis of symmetry of x^2+9x+4?
Click here to see answer by kiru_khandelwal(79)

Question 2805: I am a college student returning to classes after a 3 year break. I sure have forgotten a ton in the past three years! Here is my latest problem: How do I solve for X in this equation? Please show me the steps so I can repeat this type of problem. I feel so dunce! Thanks!
100X-4000/100X=.3
Click here to see answer by kiru_khandelwal(79)

Question 2823: When are there two solutions in quadratic equations???
Click here to see answer by AnlytcPhil(1276)

Question 2823: When are there two solutions in quadratic equations???
Click here to see answer by WannabeCAgirl83(35)

Question 2818: how do you graph x^2-x-7 as a parabola?
Click here to see answer by AnlytcPhil(1276)

Question 2787: 6x2+23x+7
Click here to see answer by gsmani_iyer(180)

Question 2855: Solve the quadratic equation by the formula:
x^2-8x+14=0

Click here to see answer by xcentaur(357)

Question 2714: need help with quadratic problem
4x^2 + 27x -7
Click here to see answer by xcentaur(357)

Question 2679: satsriakaaal
please show me how to solve the following graph quadratic equation:
x^2+3x=18
Click here to see answer by xcentaur(357)

Question 2677: 4x^2 + 3x -2=0
Click here to see answer by xcentaur(357)

Question 2666: 2X^2-6X+1=3
Click here to see answer by xcentaur(357)

Question 2688: Use the equation y=x(squared)-3x-10
-compared to the graph of y=-3x(squared), does this graph open in the same direction or opposite?
-find x-intercepts for the graph
-----------------------------------------------------
could you please answer as soon as possible and please explain how you got your answer and why it is correct...thank you so much!
Click here to see answer by khwang(438)

Question 2913: How do you complete the square for a quadratic function

Click here to see answer by creepone(1)

Question 2930: can you please solve this for me
x to the second power+6x+5=0
Click here to see answer by gsmani_iyer(180)

Question 2916: Find solution set to: X4(power) = -3
Click here to see answer by khwang(438)

Question 2995: Why are y=x^2 equations called quadratic equations? Since the prefix "quad" means four.
Click here to see answer by longjonsilver(2297)

Question 2998: what is the slope and y intercept of y=-4x+1
Click here to see answer by indiangangsta(5)

Question 3004: I'm trying to help my younger sister factorise the following, 144x^2-24, it seems simple but I've forgotten the trick to doing it. Help!

Click here to see answer by Jessmh123(22)

Question 3010: How do you find the domain and range of a quadratic equation??? And if I were to get a complex root from -40+/-the square root of negative 1472 all over 32. Would my X= -40+/- 8the square root of 23i all over 32? And if so, what are the steps to getting there???
Click here to see answer by longjonsilver(2297)

Question 2969: 2x^2 + 7x-9=2x^2-18
Click here to see answer by saint(2)

Question 3064: write this equation in standard form:
Click here to see answer by kiru_khandelwal(79)

Question 3063: solve by factoring x squared +7=28-4x
Click here to see answer by kiru_khandelwal(79)

Question 3042: factorise 8 x^2+10xy
Click here to see answer by thechamp1011(19)

Question 3099: solve the inequality,state the solution set using interval notation and graph the solution set.
4x^2-8x greater than or equal to 0
Click here to see answer by stop12345now(6)

Question 3157: What is an example of a real world application of the quadratic formula?
Click here to see answer by longjonsilver(2297)

Question 3161: Is this a quadratic equation? x + 3 = the square root of 44 + 4x.
(NOTE: 44 + 4x is all under the radicand. I don't know how to factor it so that I can subtract 3 from both sides. Would very much appreciate problem detailed on the whole)

Click here to see answer by longjonsilver(2297)

Question 3184: r2+3r+4=0
Click here to see answer by longjonsilver(2297)

Question 3222: I have been out of school for 10 years and I need help on the quadratic inequality
x^2+4x+6>or=3
Click here to see answer by drglass(89)

Question 3229: x^2-5x+3 solve the equation
Click here to see answer by drglass(89)

Question 3233: Why is it sufficient to define a quadratic function, f(x)=ax^2+bx=c in terms of a, b, and c?
Click here to see answer by mixerimaythyme(7)

Question 3232: How can you use the discriminant if a quadratic polynomial can be factored?
Click here to see answer by mixerimaythyme(7)

Question 3243: How do I solve this equation using the quadratic formula
3-4/x-2/x2=0
THREE - FOUR OVER X - TWO OVER X SQUARED = ZERO
Click here to see answer by drglass(89)

Question 3224: 10x+5 i need help with factoring
Click here to see answer by Jessmh123(22)

Question 3254: factor:2x^2+6x
Click here to see answer by Jessmh123(22)

Question 3257: factor: 14x^2+2
Click here to see answer by Jessmh123(22)

Question 3274: SORRY! I caught a typo error in my question!! Given: h=-16 t squared +vt+ s, a ball can be thrown at 40 ft/s. Set the initial height at 0.
1. a.) When will the ball reach a height of 24 feet?
b.) When does the ball hit the ground?
2.) a.) If the ball is thrown at 64 ft/s, when will it reach 48 feet?
b.) When does the ball hit the ground?

Click here to see answer by khwang(438)

Question 1368: Why is a quadratic equation given that name? What about it has a 4?
Click here to see answer by longjonsilver(2297)

Question 3349: How do you solve the following: 32x² + 7x = 81 or 32x² + 7x – 81 = 0
I have tried all possibilities to factor it out with no luck.
Click here to see answer by drglass(89)

Question 3377: how do I solve this equation for x 5xsquared +3x -4 = 0
Click here to see answer by drglass(89)

Question 3397: solve for b
b+d=a*b+4
Show work
Click here to see answer by drglass(89)

Question 3394: At Allied Electronics, production has begun on the Unitel Computer Chip. The total cost function is given by C(x)=10x+14 and the total profit function is given by P(x)=-.3x^2+31x-14, where x represents the number of boxes of computer chips produced. The total revenue function, R(x), is such that R(x)=C(x)+P(x). Find the number of boxes, x, that maximizes the revenue.
Click here to see answer by khwang(438)

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