Question

Me podrian ayudar por favor
c)×^2+x=56
d)×^2-×-56=0
e)×^2-13x=0
f)×^2+9×=0​

Answer 1

Hola

c)

x² + x = 56

x² + x - 56 = 0

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

x1 = - 8 , x2 = 7

d)

x² - x - 56 = 0

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

x= - 7. x= 8

e)

x² -13x = 0

x ( x - 13)

x1 = 0

x - 13 = 0

x2 = 13

f)

x² + 9x = 0

x (x + 9) = 0

x1 = 0

x2 = -9