Respostas

A melhor resposta!
2014-08-14T14:25:40-03:00
X²+4x+4=0
Δ= (4)² -4(1)(4)
Δ=16 - 16
Δ= 0

x=  \frac{-(4) +/- \sqrt{0}  }{2(1)}
x'=  \frac{-4}{2} = -2
x''=  \frac{-4}{2} = -2
2 5 2