Respostas

2014-03-05T13:32:14-03:00
X² + 2x + 1 = 0

Δ = b² - 4ac

a = 1
b = 2
c = 1

Δ = 2² - 4.1.1  ~> Δ = 4 - 4  ~> Δ = 0

x = (-b ± 
√Δ) / 2a

x = (-2 ± √0) / (2.1)  ~> X = (-2 ± 0) / 2  ~> X = -2 / 2  ~> X = -1