Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - R.7 Radical Expressions - R.7 Exercises - Page 74: 9



Work Step by Step

RECALL: $ab+ac=a(b+c)$ Use the rule above by factoring out $\sqrt{xy}$ to obtain: $=\sqrt{xy}(3-8) \\=\sqrt{xy}(-5) \\=\color{blue}{-5\sqrt{xy}}$
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