Answer
$\frac{\sqrt{23}}{3}$.
Work Step by Step
The given expression is
$=\sqrt{\frac{23}{9}}$
Use quotient property of square roots.
$=\frac{\sqrt{23}}{\sqrt{9}}$
Use $9=3^2$.
$=\frac{\sqrt{23}}{\sqrt{3^2}}$
Simplify.
$=\frac{\sqrt{23}}{3}$.