Question

Factor completely and then place the factors in the proper location on the grid. X 2+13x+36

Answer 1

(x+9)(x+4)

Explanation:

use that x²-Sx+P =0 where sum S = root1+root 2, product P=Root1 *root2

x²+13x+36

so here S =-13 and P=36 so whhat 2 numbers add to -13 and multiply to 36?

-9 and -4

so it can be factor as (x-root1)(x-root2) =(x- -9)(x- -4)=

(x+9)(x+4)