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: 9


$10\sqrt 2$

Work Step by Step

Recall the following rule: $(\sqrt{x^{2}})=x$ Thus, we obtain: $5\sqrt 8=5\sqrt {4\times2}=5(\sqrt {2^{2}}\times\sqrt 2)=5(2\times\sqrt 2)=10\sqrt 2$
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