Factor the polynomial.

Do the PSF (Product, Sum, Factor) Method - - you find the product of the last number, sum of the middle number, and the factors that make both the product and sum, respectively.

Factors of 20: 1, 2, 4, 5, 10, 20

You see that 10 + 2 = 12.

This polynomial will be factored into (x+10) (x+2)

X² + 12x + 20

x² + 10x + 2x + 20

(x + 2) (x + 10)