Respostas

2014-07-15T14:55:00-03:00
x²-2x+4=0

Δ=(-2)²-4.1.4
Δ=4-16
Δ=-12

12 |2
6  |2
3  |3
1

√2².3
2√3i

x'= -(-2)+
√12/2.1 = 2+2√3i/2 = 1+√3i
x'= -(-2)-√12/2.1 = 2-2√3i/2 = 1-√3i