Question

For what values of x is x2-36=5x true?

Answer 1

X = -12

Explanation:

x2-36=5x

take away 2x from both sides

-36=3x

divide both sides by 3

X = -12

Answer 2

x=-12

Explanation:

x2-36=5x

add 36 to both sides

x2=5x+36

subtract 5x from both sides

x(-3)=36

divide both sides by -3

x=-12

substitute to prove right

(-12)2-36=5(-12)

-24-36=-60

-60=-60