Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 9 - Roots and Radicals - Chapter 9 Review Problem Set - Page 430: 2



Work Step by Step

Recall the following rule: $(a^{b})^{c}=a^{bc}$ Thus, we obtain: $-\sqrt {49}=-\sqrt {7^{2}}=-(7^{2})^{\frac{1}{2}}=-7^{1}=-7$
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.