Question

x cuadrado mas 15 x mas 56 igual a 0 ayudenme porfa ​

Answer 1

x² + 15x + 56 = 0

x              + 8

x              + 7

8x + 7x = 15x

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

x + 8 = 0        x + 7 = 0

x = - 8           x = -7

CS = (-8; -7)

Eternamente axllxa