Answer
$f(x)=(x+6i)(x-6i)$
The zeros:
$x=-6i$
$x=6i$
Work Step by Step
$f(x)=x^2+36$
$f(x)=x^2-(6i)^2$
$f(x)=(x+6i)(x-6i)$
The zeros:
$0=(x+6i)(x-6i)$
$x+6i=0$
$x=-6i$
$x-6i=0$
$x=6i$
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