If
is a positive integer, the complex number
has exactly
distinct
roots, then the roots are
, where
.
The complex number is
.
Compare
with
.
.
The square roots of
are :
, here
,
.
If
, the root

If
, the root

Thus, the square roots are
and
.
Graph : \ \
\Draw the polar coordinate plane.
\Plot the complex numbers as shown in below.
\.gif\")
The square roots are
and
.
Graph :
\.gif\")