Express the following in a+ib form. `(1-i)^4`

Explanation

(1-i)^(4)=1^(4)-4 xx 1^(3) xx i+6 xx 1^(2) xx(i)^(2)-4 xx 1 xx i^(3)+(i)^(4)
=1-4 i+6 x(-1)-4 x(-i)+1.
.=1-4 i-6+4 i+1=-4.