Question

Mich expression is the factorization of x² + 10x + 21?

(x+3)(x + 7)
) (x + 4)(x + 6)
(x + 6) (x + 15)
(x + 7)(x + 14)

Answer 1

(x+3)(x+7)

Explanation:

x^2 + 10x + 21

7+3 = 10 and 7*3 = 21

(X+3)(x+7) = 0