Question

Solve by factoring
X^2+15x+56=0

Answer 1

Explanation:

factorization : find a form

(x + a)(x + b) = x² + (a + b)x + ab

56 = 7×8

15 = 7+8

so, the factoring is

(x + 7)(x + 8) = 0

the solutions are all the values to set at least just one factor to 0 :

x = -7

x = -8