Factor the expression below.

x^2 - 12x + 36

A. (X-6) (x+6)

B. (x-6) (x-6)

OC. 6 (x²-x+6)

D. (x+6) (x+6)

Ax^2 + Bx + C

A = 1

B = - 12

C = 36

Find two numbers that add to B and multiply to C

-6 + - 6 = - 12

-6 * - 6 = 36

Rewrite equation by replacing B with the two numbers:

x^2 - 6x - 6x + 36

Now factor:

x^2 - 6x - 6x + 36

= (x^2 - 6x) + ( - 6x + 36)

=x (x-6) + - 6 (x-6)

= (x-6) (x + - 6)

(X-6) (x-6)

B