Complex Arithmetic/Examples/z 1^3 - 3 z 1^2 + 4 z 1 - 8

Example of Complex Arithmetic
Let $z_1 = 2 + i$.

Then:
 * $z_1^3 - 3 z_1^2 + 4 z_1 - 8 = -7 + 3 i$

Proof
So: