Answer
-11i
Work Step by Step
$-\sqrt(-121)=-(\sqrt(-121))=-(\sqrt (121\times-1))=-(\sqrt 121\times\sqrt -1)=-(11i)=-11i$
We know that $\sqrt -1=i$, because $i^{2}=-1$. In this case, we are finding the opposite of $\sqrt (-121)$.
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.