Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 8 - Section 8.1 - Complex Numbers - 8.1 Problem Set - Page 425: 20


$3i\sqrt 5$

Work Step by Step

$\sqrt -45=\sqrt (9\times-1\times5)=\sqrt 9\times\sqrt -1\times\sqrt 5=3\times i\times\sqrt 5=3i\sqrt 5$ We know that $\sqrt -1=i$, because $i^{2}=-1$.
Update this answer!

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.