Answer
$(11xy)^{\frac{3}{2}}$
Work Step by Step
RECALL:
$(\sqrt[n]{a})^m=\left(a^{\frac{1}{n}}\right)^m=a^{\frac{m}{n}}$
For the given expression, $n=2$, $a=11xy$, and $m=3$.
Thus, using the rule above gives:
$\left(\sqrt{11xy}\right)^3=\left((11xy)^{\frac{1}{2}}\right)^3=(11xy)^{\frac{3}{2}}$
