Question

resposta dessa equaçao? x2 + 2 x + 1=0

Answer 1

x² + 2x + 1 = 0
a = 1; b = 2; c = 1

Δ = b² - 4ac
Δ = 2² - 4.1.1
Δ = 4 - 4
Δ = 0

x = - b +/- √Δ  = - 2 +/- 0
           2a              2.1

x = - 2 = - 1
        2

Resp.: x = - 1