Answer
$(x-4)(x^2+4x+16)$
Work Step by Step
RECALL:
A difference of two cubes can be factored using the formula:
$a^3-b^3 = (a-b)(a^2+ab+b^2)$
The given expression can be written as:
$x^3-4^3$
The binomial above is a difference of two cubes.
Factor using the formula above with $a=x$ and $b=4$ to obtain:
$=(x-4)(x^2+x(4) + 4^2)
\\=(x-4)(x^2+4x+16)$
