Question

Efetue (1+i)^5 . (1-i)^5

Answer 1

(1+i)^5 . (1-i)^5 = 
[(1+i).(1-i)]^5 = 
(1²-i²)^5 = 
(1 -(-1))^5 = 
(1+1)^5 = 
2^5 = 32