Respostas

2014-02-14T19:29:56-02:00
Δ=b²-4ac
Δ=-5²-4.1.(-2)
Δ=25+8
Δ=33
x=-5+- √33/2.1
x=-5+-√33/2
x=-5+-√3.3/2
x1=-5+√33/2
x2=5-√33/2