Answer
$-9\sqrt{2}+6\sqrt{y}$
Work Step by Step
Changing the sign of the middle term, then the conjugate of $
-9\sqrt{2}-6\sqrt{y}
$ is
\begin{array}{l}
-9\sqrt{2}+6\sqrt{y}
.\end{array}
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.