Need help please.

The roots (zeros) are the
x
x
values where the graph intersects the x-axis. To find the roots (zeros), replace
y
y
with
0
0
and solve for
x
x
.
x
=
√
2
,
−
√
2
,
i
,
−
i
,
−
1
,
1
x
=
2
,
-
2
,
i
,
-
i
,
-
1
,
1