How do you solve for x in this: 12x=32+x^2?

navin2013-02-20T10:21:05Z

Favorite Answer

12x = 32 + x^2
=> x^2 - 12x + 32 = 0
=> x^2 - 8x - 4x + 32 = 0
=> x(x - 8) - 4(x - 8) = 0
=> (x - 8)(x - 4) = 0
=> x - 8 = 0 or x - 4 = 0
=> x = 8 or x = 4 Ans.

Bob B2013-02-18T23:54:23Z

Subtract 12x from both sides:

0 = x^2 - 12x + 32

Factor to:

0 = (x - 4)(x - 8)

Solutions are x = 4 and x = 8

Moe2013-02-18T23:55:52Z

first bring 12x to the other side

so it would be
0=x^2-12x+32
then use the quadratic formula

Kaity2013-02-18T23:54:26Z

move 12x to the other side and equal it all to zero. Hope I helped. Xx. Your answer should be ---> (x-8)(x-4)