Answer
$\frac{9}{5}$
Work Step by Step
Recall the following rule:
$(\sqrt{x})^{2}=x$
Thus, we obtain:
$\sqrt \frac{81}{25}=\sqrt \frac{9^{2}}{5^{2}}=\frac{\sqrt {9^{2}}}{\sqrt {5^{2}}}=\frac{9}{5}$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
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
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