Question 890689
The zeros are -3i, <b>3i</b>, and -2.


{{{(x-(3i))(x-(-3i))(x-(-2))}}}
{{{(x-3i)(x+3i)(x+2)}}}
{{{(x^2-(3i)^2)(x+2)}}}
{{{(x^2-9i^2)(x+2)}}}
{{{(x^2-9(-1))(x+2)}}}
{{{(x^2+9)(x+2)}}}
-
{{{highlight(x^3+2x^2+9x+18)}}}