Answer
$-\frac{\sqrt 6}{2}$
Work Step by Step
We are given:
$-\frac{\sqrt 18}{\sqrt 12}$
$=-\frac{\sqrt 3.\sqrt 6}{\sqrt 4.3}$
$=-\frac{\sqrt 3.\sqrt 6}{2\sqrt 3}$
$=-\frac{\sqrt 6}{2}$
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