Answer
$x^{3}(x-4)$
Work Step by Step
We are given the polynomial $x^{4}-4x^{3}$. The GCF of both terms is$x^{3}$, so we can factor $x^{3}$ out from each term.
$x^{3}(x)-x^{3}(4)$
Next, we can apply the distributive property.
$x^{3}(x-4)$