Question

Calcule as potencias (de números complexos): (A): (1 + i)² (B): (-2 + i)²

Answer 1

A= (1+i)²= 1+ 2i +i² = 1+ 2i -1 = 2i

B= (-2+i)²= 4 -4i +i² = 4 -4i -1 = 3-4i