Answer
$\color{blue}{-5\sqrt{xy}}$
Work Step by Step
RECALL:
$ab+ac=a(b+c)$
Use the rule above by factoring out $\sqrt{xy}$ to obtain:
$=\sqrt{xy}(3-8)
\\=\sqrt{xy}(-5)
\\=\color{blue}{-5\sqrt{xy}}$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
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
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