Express each of the complex number given in the  form of  a + ib.

(1 - i)⁴


             

(1 - i)⁴ =  [(1 - i)²]² = [(1)² + (i)² - 2(1)(i)]² = (1 + i² - 2 i)²
                         = [1 - 1 - 2i]² = [-2i]² = 4i² = 4(-1) = -4