Question

c) -x2 - 7x = 0
d) x2 - 16 = 0
e) x2 + Ox + 0
me ajudem pfv​

Answer 1

Resposta:

Explicação passo-a-passo:

C)

-x^2 - 7x = 0 (-1)

x^2 + 7x = 0

x.(x + 7) = 0

x = 0

x+7 = 0

x = - 7

R.: {0, - 7}

______________

d)

x^2 - 16 = 0

x^2 = 16

x = V16

x= +/- 4

R: {4; - 4}

_____________

e) x2 + Ox + 0 = 0

X^2 = 0

x = V0

x= 0

R.: {0}