Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 176593: Please help. I have another one that I think I solved but I have never had one come out in decimals before and it is for a quiz and I want to make sure it is correct.
f(x)=x^2-9x+5
I used the -b/2a and 4ac-b^2/4a formulas which makes the problems 9/2(1)and 4(1)(5)-(-9)^2/4(1).
I came up with x=4.5 and y=25.25 Is this right? Thank you so much.
Click here to see answer by stanbon(75887)  |
Question 176602: Thank you Stan for answering this the first time, however, I did fail to put in that we have to find the x and y intercepts.
f(x)=x^2-9x+5
I used the -b/2a and 4ac-b^2/4a formulas which makes the problems 9/2(1)and 4(1)(5)-(-9)^2/4(1).
I came up with x=4.5 and y=25.25 Is this right? Thank you so much.
Click here to see answer by MathLover1(20849)  |
Question 176602: Thank you Stan for answering this the first time, however, I did fail to put in that we have to find the x and y intercepts.
f(x)=x^2-9x+5
I used the -b/2a and 4ac-b^2/4a formulas which makes the problems 9/2(1)and 4(1)(5)-(-9)^2/4(1).
I came up with x=4.5 and y=25.25 Is this right? Thank you so much.
Click here to see answer by Mathtut(3670) |
Question 176588: Please Help! I have tried several times to solve it and keep getting different answers
x^2+13/2x=13
I started by moving the 13 to the other side to make a quadratic equation:
x^2+13/2x-13=0 right? and I have no idea after that. Thank you so much
Click here to see answer by Fombitz(32388)  |
Question 176591: Please help. This one I think I have solved it, but I am unsure of what the solution means. Here is the problem.
Determine the nature of the solution. x^2-20x+100=0 a)2 non-real solutions
b)2 real solutions or c)1 real solution.
I know that if the answer is zero than it is 1 real, if it is positive, than it is 2 real, and if it is negative than it is 2 non-real. I think I got the solution down to 10+or- the square root of 0.
Is that right? Thank you for your help
Click here to see answer by stanbon(75887) |
Question 176790: Solve 2x^2-6x-3=0 Which one is the answer? I can work it all the way to were x= +6 ± √60/4...I get stuck after that part.
A) -3+√15/2 and -3-√15/2
B) 3+2√15/2 and 3-2√15/2
C) There are no real solutions
D) 3+√15/2 and 3-√15/2
Click here to see answer by Alan3354(69443)  |
Question 176813: The length of a rectangle is 3in. more than twice its width. If the perimeter of the rectange is 30in., find the dimensions of the rectangle. Choose the answer with the correct equations used to solve this problem.
Click here to see answer by nerdybill(7384)  |
Question 176902: Please help. Here is one that says solve and then find the x intercept.
3x^2-5x-11=0
When I used the quadratic equation I came up with an answer of
5+square root of 157 divided by 6 AND 5-square root of 157 divided by 6.
Then when I found the x intercept my answers were x=5/6 and y=-107/12.
This does not seem right to me. Is it? Thank you
Click here to see answer by vleith(2983) |
Question 176902: Please help. Here is one that says solve and then find the x intercept.
3x^2-5x-11=0
When I used the quadratic equation I came up with an answer of
5+square root of 157 divided by 6 AND 5-square root of 157 divided by 6.
Then when I found the x intercept my answers were x=5/6 and y=-107/12.
This does not seem right to me. Is it? Thank you
Click here to see answer by josmiceli(19441)  |
Question 176934: I would like to know if you would be able to help me with this problem.
using this equation:
h= -16t^2+vt+c
Problem- a child tosses a ball upward with a starting velocity of 10 ft/s from a height of 3 ft.
b) solve. if not caught how long will the ball be in air?
Thank you for any help you can offer me!
Thank you so much!!
-j2012
Click here to see answer by jim_thompson5910(35256) |
Question 176899: Please help with this one...the directions are to find the vertex, the line of symmetry, the minimum and maximum value of the quadratic equation and then graph it. I know that once I get the vertex, I can find the rest. I have solved it close to the end, but I am not sure where to go from here...
f(x)=-2x^2+2x+7
I used the equation -b+- the square root of b^2-4ac divided by 2a
I got to -2+-the square root of 60 divided by 4. Now I am stuck...thank you for the help.
Click here to see answer by scott8148(6628)  |
Question 176899: Please help with this one...the directions are to find the vertex, the line of symmetry, the minimum and maximum value of the quadratic equation and then graph it. I know that once I get the vertex, I can find the rest. I have solved it close to the end, but I am not sure where to go from here...
f(x)=-2x^2+2x+7
I used the equation -b+- the square root of b^2-4ac divided by 2a
I got to -2+-the square root of 60 divided by 4. Now I am stuck...thank you for the help.
Click here to see answer by Earlsdon(6294) |
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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, 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