If n is a positive integer, the complex number has exactly n distinct n th roots.

The roots are , where

The complex number is .

 Compare the complex number with a + ib.

a = 2 and b = 2.

a = 2 > 0,  so, the angle is :

The trigonometric form of is .

The square roots of are :

, here n = 2 and k = 0 and 1

If k = 0, the complex root

If k = 1, the complex root

The square roots of the complex number are .