Answer
$|x^3|\sqrt{x}$
Work Step by Step
Factor the radicand (expression inside the radical sign) so that at least one factor is a square to obtain:
$=\sqrt{x^6(x)}
\\=\sqrt{(x^3)^2(x)}$
The principal square root is always non-negative.
Thus, apply the absolute value to the square root of $(x^3)^2$ to obtain:
$=|x^3|\sqrt{x}$
