Respuesta :

-5x=x^2+7x

-5x -x² -7x = 0

-x(5 + x + 7 ) = 0

-x(12 + x ) = 0

-1(-x) = -1(0)
X= 0

12+X = 0
X = -12



X1 = 0
X2 = -12