Question

x²+2x-3=0 qual a resposta

Answer 1

Δ= 2² - 4 . 1 . (-3)
Δ= 4 + 12
Δ= 16

x = -2 ± 4 / 2
x' = 2 / 2 = 1
x" = - 6 / 2 = -3

s={ 1 , -3 }