Question

express in the form of a+ib form 1+2i/1-(1-i)2

Answer 1

(1+2i)/ 1- 2 +2i
= (1+2i)/ -1 +2i
= { (1+2i)/ -1 +2i} X (-1 -2i)/ (-1 -2i)
= {(1+2i) X (-1 -2i)}/1. - 4i^2
=(-1 -2i -2i -4 i^2)/(1. +4)
=( -1 +4 -4i)/5
= 3/5. -(4/5) i