Work Step by Step
Step 1: $\sqrt (-9)$ Step 2: $\sqrt (-1\times9)$ Step 3: $\sqrt -1\times\sqrt 9$ Step 4: As $i=\sqrt -1$, the expression becomes $i\times3$ or $3i$
You can help us out by revising, improving and updating this answer.Update this answer
After 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.