Answer
$(x^2-3)(x^2+3)$
Work Step by Step
RECALL:
A difference of two square can be factored using the formula
$a^2-b^2=(a-b)(a+b)$
The given binomial can be written as:
$=(x^2)^2-3^2$
The binomial above is a difference of two squares.
Factor the difference of two squares using the formula above with $a=x^2$ and $b=3$ to obtain:
$=(x^2-3)(x^2+3)$
