( - 5 + 9i) 1 + i ( -5 + 9i)(1 + i )
------------ * ------------ = -------------------- ( i^2 = - 1)
1 - i 1 + i 1 - i^2
- 5 - 5i + 9i + 9 i^2 - 5 - 5i + 9i + 9( - 1)
----------------------------- = --------------------------------- =
1 - ( - 1) 1 + 1
( - 14 + 4i)/2 = - 7 + 2i