2
$\begingroup$

Here's the question:

z is a complex, and if $z^5 + z^4 + z^3 + z^2 + z + 1 = 0$ then $z^6=1$.

use this fact to calculate how many answers is there for:

$$z^5 + z^4 + z^3 + z^2 + z + 1 = 0$$

Thanks.

1 Answers 1