Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Prerequisites - P.2 - Exponents and Radicals - Exercises - Page 25: 43


(a) $2\sqrt 5$ (b) $4\sqrt[3] 2$

Work Step by Step

(a) $\sqrt {20}=\sqrt {4\times5}=\sqrt {2^2\times5}=2\sqrt 5$ (b) $\sqrt[3] {128}=\sqrt[3] {64\times2}=\sqrt[3] {2^6\times2}=2^2\sqrt[3] 2=4\sqrt[3] 2$
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