Respostas

2014-08-02T18:44:34-03:00
F(x)=x²-4x+4
Δ=b²-4ac
Δ=(-4)²-4.1.4
Δ=16-4.4
Δ=16-16
Δ=0

x= -b+/- √Δ/2a
x=-(-4)+/- /2.1
x=+/-4/2
x=+/-2
2 4 2