Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 428247: What is the increasing interval of y=x^2-2x-3
Click here to see answer by Gogonati(855)

Question 428278: Solve each quadratic equation by completing the square.
1.X^2+4x+2=0
2.X^2+8x=1
3.X^2+2=6x+4
Click here to see answer by stanbon(75887)

Question 428278: Solve each quadratic equation by completing the square.
1.X^2+4x+2=0
2.X^2+8x=1
3.X^2+2=6x+4
Click here to see answer by nerdybill(7384)

Question 428388: Solve for x
64(x^2) = 25
Click here to see answer by rfer(16322)

Question 428673: 3y^2+5y=-2
Click here to see answer by Gogonati(855)

Question 428818: How do you find line of symmetry,y intercept, x-intercepts, maximim/minimum point from an quadratic equation to plot the parabola without using a graphing calculator and only using the equation?
Click here to see answer by ankor@dixie-net.com(22740)

Question 428970: My problem is;
Solve by factoring and using the principle o zero products
49k^2=36
Thank you very much
Click here to see answer by algebrahouse.com(1659)

Question 341980: I know that the fomula x= -b/2a is used to solve for the minimum/maximum value of a quadratic formula but what happens when the quadratic formula is a= -6 b=0(?) c= -1. I know that the maximum value= -1 but I dont understand how to solve for it. Please Help Me. Thanks in advance for your help and glorious time.
- Kay
Click here to see answer by robertb(5830)

Question 429003: The area of a rectangle is 80 meters. the length is one more than three times the width. Find the dimensions of the rectangle.
Click here to see answer by algebrahouse.com(1659)

Question 428848: How can I find the vertex while using the quadratic formula?
y= -5x^+25x+70
Click here to see answer by htmentor(1343)

Question 429225: x^2-12x+36=0
Click here to see answer by ewatrrr(24785)

Question 429349: Create a polynomial that produces the solutions +-4i.
Click here to see answer by stanbon(75887)

Question 429682: what line of symmetry is this function y=|x+2|

Click here to see answer by stanbon(75887)

Question 429718: How do you solve the equation t^5 -256t = 0
Click here to see answer by Gogonati(855)

Question 429746: what is the answer of this equation 4(s-2)=0
Click here to see answer by stanbon(75887)

Question 429757: What is the answer to
I have tried this already and I came up with some crazy answer of x= -1.625 and x= -4.375.
Click here to see answer by stanbon(75887)

Question 429922: (x-1)(x+1)(x)=120

Click here to see answer by Alan3354(69443)

Question 429927: solve the following quadratic equation by factoring
x2-6x-16=0
Click here to see answer by jorel1380(3719)

Question 430055: One concert ticket costs $90. For each addl ticket sold to the group, the price of all tickets is reduced by $3. So 2 tickets costs 2x84 = $174, etc. Write a quadratic function that gives the total cost, C, of buying x tickets.
Click here to see answer by josmiceli(19441)

Question 430036: picture frame is 22 cm by 15 cm. If 198 cm2 of picture shows, what would the width of the frame if all sides are even?
Click here to see answer by jorel1380(3719)

Question 430059: write the quadratic function in the form ax^2 + bx + c and use fractions in your answer. f(x)= -2/3 (x+4)^2 + 4/3
Click here to see answer by dnanos(83)

Question 430115: t^2+4t-2=0
Click here to see answer by haileytucki(390)

Question 430117: how many real solutions to the equation x^2-7x+12
Click here to see answer by haileytucki(390)

Question 430134: how do i find A :
B = tan A
B is 2.667, but i dont know what the next step is.
after I find A, im supposed to use it in the equation :
a =[ -16 / v^2 (cos A)^2]x^2 + (tan A)x
so any help would be appreciated
Click here to see answer by Alan3354(69443)

Question 375999: 2x-3y=9
Click here to see answer by Keeping_it_real(3)

Question 430208: A projectile is thrown upward so that its distance above the ground after t seconds is h=-15t(squared)+390t. After how many seconds does it reach its maximum height?
Click here to see answer by Gogonati(855)

Question 430206: the owner of a video store has determined the cost C, in dollars, of operating the store is approximately C(x):2x(squared)-30x+570, where x is the number of videos rented daily. Find the lowest cost to the nearest dollar.
Click here to see answer by ewatrrr(24785)

Question 430209: The profit that the vendor makes per day by selling x pretzels is given by the function P(x)=-0.002x(squared)+1.4x-150. Find the number of pretzels that must be sold to maximized profit.
Click here to see answer by nerdybill(7384)

Question 430231: I need help with a few Algebra problems, please.
If the discriminant in the quadratic formula is a perfect square, then the quadratic equatio will have _____________solution(s).
Solve the quadratic formula. Simplify the answer.
x^2 - 3x - 1 = 0
4x^2 + x - 1 =0
Thank you for your help!
Click here to see answer by stanbon(75887)

Question 430301: A student opens a math book to two facing pages. The product of the page number is 506. Find the first and second page number.
Please help
thanks
Click here to see answer by rfer(16322)

Question 430287: How to find the zeros of the function by graphing the function?
F(x)= x^2 - 25
Click here to see answer by rfer(16322)

Question 430287: How to find the zeros of the function by graphing the function?
F(x)= x^2 - 25
Click here to see answer by Alan3354(69443)

Question 430335: length of a rectangle is twice the width. the area is 18yd^2. find the lenght and width..
thanks
Click here to see answer by John10(297)

Question 430333: Write a quadratic equation in the varable x having the given number as solution.
Solution 1...only one solution
Click here to see answer by stanbon(75887)

Question 430443: hello, my problem here is as follows;
10+8q=3q^2
=(-3q)^2+8q+10
= -(-3q)+/- squared root of (-3)^2-4X(-3)X10/2X(-3)
{9-(-120)}
=-(-3) +/- squared root of 129/-6
= -21.5
i am stuck at one of these steps that i have done (i am unsure of which one)
because a negative integer cannot be square rooted.
please help me, thank you very much for your time and effort, it is greatly appreciated!
sincerely,
lost 15 year old
Click here to see answer by mananth(16946)

Question 430457: how do i simplify the problem the square root of (2x-3)squared
Click here to see answer by Gersid(33)

Question 430513: the area of a playground is 221yd^2.the width of the playground is 4yd longer than its lenght.find the lenght and width of the playground.
(hint include correct units in your final answer)
Click here to see answer by Alan3354(69443)

Question 430517: find the equation of the axis of symmetry and the coordinates of the vertex of the graph of the function.
y=4x^2+5x-1
Click here to see answer by stanbon(75887)

Question 430587: What is the x intercept and the y intercept for the following:
f(x) = x^2 - 3x + 1
Click here to see answer by ewatrrr(24785)

Question 430592: What are the exact solutions for the following to 3 decimal places:
(x + 7)^2 = 81
Click here to see answer by ewatrrr(24785)

Question 430636: What is the vertex, symmetry, and max/min value of f(x)for the following:
f(x)=-(x+9)^2 - 4
Click here to see answer by Gogonati(855)

Question 430706: a fountain thatis 5ft tall sprays water into the air with an upward velocity of 22ft/s. What function gives the hieght of the water in feet and seconds after it is sprayed upward? what is the maximum height ofthe water?

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