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: 4



Work Step by Step

Recall the following rule: $(\sqrt{x})^{2}=x$ Thus, we obtain: $\sqrt \frac{81}{25}=\sqrt \frac{9^{2}}{5^{2}}=\frac{\sqrt {9^{2}}}{\sqrt {5^{2}}}=\frac{9}{5}$
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