Respuesta :

khalil2012am

Answer:

x=-7,     x=-8

Step-by-step explanation:

x^2 +15x +56=0

look for two numbers that their sum is 15 and their product =56

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

x=-7,     x=-8

ghanami

Answer:

Step-by-step explanation:

x²+15x+56 =(x+7)(x+8)

Otras preguntas