Respostas

2014-04-11T01:12:47-03:00
4x²-8x=0   a=4 b=-8 c=0
Δ=-8²-4.4.0
Δ=64
x=-(-8) \frac{+}{-} √64
          2.4
x=8 \frac{+}{-} 8
      8

x1=2
x2=0