Algebra and Trigonometry 10th Edition

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

Chapter 1 - Review Exercises - Page 154: 119


False. $\sqrt {-18}\sqrt {-2}\ne\sqrt {(-18)(-2)}$

Work Step by Step

$\sqrt {-18}\sqrt {-2}=3\sqrt 2i\sqrt 2i=3(\sqrt 2)^2i^2=3(2)(-1)=-6$ $\sqrt {(-18)(-2)}=\sqrt {36}=6$
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