Answer
$(x^2-2)^2$
Work Step by Step
RECALL:
$a^2-2ab+b^2=(a-b)^2$
The given trinomial can be written as:
$=(x^2)^2-2(x^2)(2) + 2^2$
This trinomial is in the same form as the perfect square trinomial above where $a=x^2$ and $b=2$.
Factor the perfect square trinomial using the formula above to obtain:
$=(x^2-2)^2$
