Respostas

2014-04-03T12:09:42-03:00
(1 + 10i).(10 - i)
10 - i + 100i - 10i²
10 - i + 100i + 10
100i - i + 20
1 5 1
2014-04-03T12:11:29-03:00
(1+10i).(10-i)
10-1i+100i-10i=0
10+89i=0
89i=-10
i=-10/89
creio que seja isso.