1) (z)^2 = (√2 - i)^2 = 2 - 2√2i + i^2 = 2 - 2√2i - 1 = 1 - 2√2i
2) (z)^5 = ((√2 - i)^2)^2 (√2 - i) = (1 - 2√2i)^2 (√2 - i) = (1 - 4√2i + 8i^2) (√2 - i) = (1 - 4√2i - 8 - 8√2) (√2 - i) = (-7 - 12√2) * (√2 - i) = -7√2 - 7i - 12i√2 + 12 = -7√2 - 7i - 12√2i + 12
1) (z)^2 = (√2 - i)^2 = 2 - 2√2i + i^2 = 2 - 2√2i - 1 = 1 - 2√2i
2) (z)^5 = ((√2 - i)^2)^2 (√2 - i) = (1 - 2√2i)^2 (√2 - i) = (1 - 4√2i + 8i^2) (√2 - i) = (1 - 4√2i - 8 - 8√2) (√2 - i) = (-7 - 12√2) * (√2 - i) = -7√2 - 7i - 12i√2 + 12 = -7√2 - 7i - 12√2i + 12