2x squared + (x+3)squared
what is x
2006-08-24 12:05:25 · 8 answers · asked by dido45dido 3 in Education & Reference ➔ Homework Help
i can do most of it but how do you cancel out the exponet
2006-08-24 12:08:32 · update #1
sorry = to 225
2006-08-24 12:09:10 · update #2
Since this is only an expression and not an equation (a problem set up as equal to another quantity), there is no way to find the value of x. You can only simplify not solve and the exponents won't go away.
2006-08-24 12:13:06 · answer #1 · answered by Caffeinated 4 · 1⤊ 0⤋
2 x^2 + (x+3)^2 = 225
i guess u gotta factor it all out first:
2x^2 + x^2 + 3x + 3x + 9 = 225
3x^2 + 6x + 9 = 225
take out the 3 to get a quadratic:
3(x^2 + 2x + 3) = 225
x^2 + 2x + 3 = 75
x^2 + 2x -72 = 0
i'm stuck. :(......
2006-08-24 12:17:32 · answer #2 · answered by sasmallworld 6 · 0⤊ 0⤋
5x^2 + 6x + 9 .....quadratic formula........-6 + or - square root of (6^2 -4(5)(9)) all divided by 2(5)......but because the part of the equation inside the square root comes out to be negative, the answer is no solution, unless you've learned imaginary numbers, which I doubt you have yet because you didn't know how to do that right away.
2006-08-24 12:21:45 · answer #3 · answered by Julie 3 · 0⤊ 0⤋
4x^2 + x^2 + 6x + 9 = 225
5x^2 + 6x + 9 = 225
5x^2 + 6x - 216 = 0
(5x+36)(x-6)=0
so x = -36/5 or x = 6
2006-08-24 12:17:49 · answer #4 · answered by MollyMAM 6 · 0⤊ 0⤋
2x squared +10X +3=0
factor that, but I think there is no solution.. or this is a hard one to factor
2006-08-24 12:11:35 · answer #5 · answered by Tori J 2 · 0⤊ 0⤋
2x2 + X2 + 9 =225
3x2 +9 = 225
3x2 = 216
x2 = 72
x = sqrt(72)
I think
2006-08-24 12:15:00 · answer #6 · answered by starting over 6 · 0⤊ 0⤋
Since you did not set this equation to any quantity, there's no way to know.
2006-08-24 12:08:05 · answer #7 · answered by Anonymous · 0⤊ 0⤋
wish i could help you
2006-08-24 12:14:02 · answer #8 · answered by smile more :) 5 · 0⤊ 0⤋