Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 870063: Please help me solve.
(2+6i)/(5+i)
Click here to see answer by Alan3354(69443)

Question 870032: Please help with this problem:
sqrt(2x+3) + sqrt(x-2) =2
Click here to see answer by ankor@dixie-net.com(22740)

Question 870064: Complete the square:
x^2 +4x +2 = 0
Click here to see answer by Fombitz(32388)

Question 870066: Problem is:
(3x)/(x+3) = 9 -(9)/(x+3)
Click here to see answer by Fombitz(32388)

Question 870118: Please help!!
(x+8)^2 +15(x+8) +54 = 0
Click here to see answer by lwsshak3(11628)

Question 870120: I need help on this one please
5x^2 = 8x+21
Click here to see answer by KMST(5328)

Question 870278: Use the factoring to solve the quadratic equation. Check by substitution or by using a graphing utility.
5x^2 =8x+21
Click here to see answer by mananth(16946)

Question 870276: Solve the quadratic equation using the square root property.
(x+8)^2 = -49
Click here to see answer by mananth(16946)

Question 870273: 1/(x+1) +4 = 9/(x+1)
A. Write the value or values of the variable that make a denominator zero. There are restrictions on the variable.
B. Keeping the restrictions in mind, solve the equation.
Click here to see answer by Fombitz(32388)

Question 870279: Find he solution for the equation.
2|2x|+5=11
Click here to see answer by Fombitz(32388)

Question 870397: If 3000,00 is invested for 2 years how many months will the money be in the account?
Click here to see answer by Alan3354(69443)

Question 870458: Write the quadratic function in the form: g(x)=a(x-h)^2-k
Then, give the vertex of its graph.
g(x)=-3x^2+12x-8
Thanks
Click here to see answer by ewatrrr(24785)

Question 870660: solve the equation. exact solutions if possible (round to the nearest tenth). (x+9)(x-4)=0
Click here to see answer by Fombitz(32388)

Question 870815: find the number of solutions of 5x^2-10x-8=0 by using the discriminant.
Help please, show work please and thanks.
Click here to see answer by ewatrrr(24785)

Question 870815: find the number of solutions of 5x^2-10x-8=0 by using the discriminant.
Help please, show work please and thanks.
Click here to see answer by richwmiller(17219)

Question 870859: nn+2) factor to find values of n
Click here to see answer by richard1234(7193)

Question 870895: When asked to solve the equation (x-3)^2=11, Jess said, "That's easy - just take the square root of both sides," Perhaps Jess also remembered that 11 has two square roots, one positive and other negative. What are the two values for x, in exact form? (In this situation, "exact" means no decimals.
(answer= x=3 + square root of 11 and x=3-square root of 11)-----is this correct?
(Continuation) When asked to solve the equation x^2-6x=2, Deniz said, "Hmmm-- not so easy, but I think that adding something to boths sides of the equation is the thing to do," This is indeed a good idea, but what number should Deniz add to both sides? How is this equation related to the previous one?
Click here to see answer by ankor@dixie-net.com(22740)

Question 871014: please help me solve this equation: rewrite in standard form. then solve the equation in standard form by graphing. write roots clearly.
Click here to see answer by stanbon(75887)

Question 871020: Graph f(x)= ax^2+bx+c
A) state the number of real number solutions of ax^2+bx+c=0
B)state whether a is positive or negative
C) determine the maximum function value of f
Click here to see answer by josgarithmetic(39613)

Question 871018: please help me solve this equation : solve by graphing the corresponding function and determining zeros.
Click here to see answer by josgarithmetic(39613)

Question 871019: please help me solve this: rewrite in standard form. then solve the equation in standard form by graphing. write roots clearly
Click here to see answer by josgarithmetic(39613)

Question 871013: please help me solve this equation: solve by graphing the corresponding function and determining the zeros.
Click here to see answer by josgarithmetic(39613)

Question 871053: please help me make this into standard form and show it in a graph with roots.
Click here to see answer by josgarithmetic(39613)

Question 871053: please help me make this into standard form and show it in a graph with roots.
Click here to see answer by MathTherapy(10549)

Question 871082: Write a quadratic equation having solutions -3 and 1/2
Click here to see answer by josgarithmetic(39613)

Question 871080: Determine the type of number that the solutions of x^2+ 4x+12=0 will be and how many solutions exist.
Click here to see answer by josgarithmetic(39613)

Question 871079: Solve step by step
4x^2-27=0
Click here to see answer by mananth(16946)

Question 871077: Sole step by step
X^-2-x^-1=6
Click here to see answer by mananth(16946)

Question 871084: Multiply
Square root -16 multiply by Square root -9
Click here to see answer by mananth(16946)

Question 871151: What multiplies to -30 and adds to -34?
Click here to see answer by Fombitz(32388)

Question 871154: I need to find the vertex of the parabola formed by the following quadratic function:
Click here to see answer by Fombitz(32388)

Question 871202: I haven't been at school for almost two weeks and when I came back I had to take a math test on stuff I was not taught. I tried to do the best I could but I made a 49. The teacher said I could make it up by correcting the questions I got incorrect. For the problem I'm about to ask you about, I tried to solve all the answers three times for each choice and I still couldn't receive the correct answer. I finally put down "B" because it was the solution I got the farthest on.
Question:
Which of the following shows a quadratic expression and its factored form?

Answer choices:
A. Quadratic form: 4xsquared-3xsquared+1; Factored form: 4(x-3)(x+1)
B. Quadratic form: 5xsquared-10x-15; Factored form: 5(x-1)(x+3)
C. Quadratic form: -3xsquared-2x-8; Factored form: -3(x-4)(x+2)
D. Quadratic form: -2xsquared+18; Factored form: -2(x-3)(x+3)
Could you also provide a reason on why you chose the answer you got please?
Click here to see answer by Fombitz(32388)

Question 871359: Translate to a quadratic equation, then solve using the quadratic formula.
The length of a rectangular air filter is 3 inches less than twice the width. Find the length and the width of the filter if the area is 665 square inches.
What are the length and the width??
Click here to see answer by mananth(16946)

Question 871369: Create a graph showing a quadratic function that is increasing from (-∞,5) and decreasing from (5,∞).
Click here to see answer by KMST(5328)

Question 871470: A factory is to be built on a lot that measures 80m by 60m. A lawn of uniform width and equal in area of the factory must surround the factory. What dimensions must the factory have?
Using quadratic equations and the quadratic formula (grade 10)
Click here to see answer by josgarithmetic(39613)

Question 871468: The hypotenuse of a right triangle is 6cm and one side is 2cm longer than the other. Find the length of each side to the nearest tenth of a centimeter.
In this question, you have to use quadratic equations. (Grade 10)
Click here to see answer by mananth(16946)

Question 871498: Solve step by step :-
9d^4-490d^2+490=0
Click here to see answer by Fombitz(32388)

Question 871531: (x+5)/(x^3+1)=0 solve for x
Click here to see answer by Fombitz(32388)

Question 871637: Suppose a baseball player "pops up", that is, hits the baseball straight up into the air. The height, h, of the baseball t seconds after it leaves the bat can be calculated using a formula from physics that takes into account the initial speed of the ball and the height at which it was hi. The formula for the height of the ball in feet in h= -16t^2+64t+4
Graph the height of the baseball versus time. connect the dots with a smooth curve.
What are the coordinates of tye highest point on the graph? When does the baseball reach its maximum height? What is that height? By
Click here to see answer by richwmiller(17219)

Question 871863: This is a question about "word problems involving quadratics." please help soon! The problem is, "the width of a flag is 3/5 it's length. The area of the flag is 1,500 square feet. What are the dimensions of the flag?" I am confused with how this problem is quadratic , and how to find the solution. I have attempted this problem multiple times! Thanks for the help.
Click here to see answer by richwmiller(17219)

Question 871669: A bus company has 4000 passengers daily, each paying a fare of $2. For each $0.15 increase, the company estimates that it will lose 40 passengers per day.
- What fare will maximize the revenue? How many passengers will ride at this price?
I'm not sure if it's correct but I calculated 43.3 to be the price increases would maximize the revenue. What I did was plugged the 43.3 into the equation (2+0.15x) which is the cost of each item and (4000-40x)but i'm not sure if 8.50 is right for the fare and 2264 people will ride that day. Can you just check if I've done it right?
Click here to see answer by ankor@dixie-net.com(22740)

Question 871953: If the two roots of the equation: X^2+X-3=0 are M and N:
a. Form the equation that has the roots 1/M, 1/M.
b. Form the equation that has the roots M^2, N^2.
Click here to see answer by josgarithmetic(39613)

Question 871951: a rectangular storage area is 8m longer than it is wide. if the area is 28m^2, what are its dimensions? solve by completing the square.
Click here to see answer by josgarithmetic(39613)

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