Question

Calcule a potência (1 - i)^15

Answer 1

=((1-i)²)*7.(1-i)=( 1-2i+i²)*7.(1-i)=(1-2i-1)*7.(1-i)=(-2i)*7.(1-i)=-128*7.(1-i)

=-128i*4.i² .i.(1-i)=-128.1.(-1).i.(1-i)=128i(1-i)=128i- 128i²=128i -128(-1)

=128i +128   Resposta :  128 +128i