Respostas

2014-07-13T17:00:39-03:00
-2x²+10x=0

a=-2
b=10
c=0

Δ=10²-4.(-2).0
Δ=100-0
Δ=100

x' = -10+√100/2.(-2) = -10+10/-4 = 0/-4 = 0
x'' = -10-√100/2.(-2) = -10-10/-4 = -20/-4 = 5