Answer
$-\sqrt 3$
Work Step by Step
Rationalize the denominator by multiplying $\sqrt 6$ to the numerator and denominator.
$\frac{-3\sqrt 2}{\sqrt 6}\times\frac{\sqrt 6}{\sqrt 6}$
Simplify
$\frac{-3\sqrt 12}{6}$
$\frac{-3\sqrt 4\times\sqrt 3}{6}$
$\frac{-3\times2\sqrt 3}{6}$
$\frac{-6\sqrt 3}{6}$
$-\sqrt 3$
Answer: $-\sqrt 3$