Question

x elevado ao quadrado +3x

Answer 1

x² + 3x = 0

Δ= 3² - 4 . 1 . 0
Δ= 9 - 0
Δ= 9

x= - 3 ± 3 / 2
x'= 0 / 2 = 0
x"= -6 / 2 = -3

s={ 0 , -3 }