Respostas

2014-05-04T12:52:31-03:00
2x²-3x+5=0
a=2 , b=-3 , c= 5
Δ=b²-4.a.c
Δ=(-3)²-4(2).(5)
Δ=9-40
Δ=-31 
∉ Δ ∈ |R