Respostas

2013-08-19T19:30:41-03:00
2+3i . (4- 3i) = 8 - 6i +12i -9i²       = 8 + 6i +9 =   17 + 6i
4+3i   (4 - 3i)    16 -12i + 12i - 9i²      16 +9            25
3 3 3