Question 226462
z=(sq root 2 - i) to the fourth power
------------
z = sqrt(2) - i
z^4 = {{{(sqrt(2) - i)^4}}}
z^2 = (2 - 1 - 2isqrt(2))
z^2 = 1 - 2isqrt(2)
z^4 = 1 - 8 - 4isqrt(2)
z^4 = -7 - 4isqrt(2)
-----------