Answer
$19\sqrt x-10$
Work Step by Step
$5\sqrt x+7\sqrt {4x}-10$
=$5\sqrt x+7\sqrt {4\times x}-10$
=$5\sqrt x+7(\sqrt 4\times \sqrt x)-10$
=$5\sqrt x+7(2\times \sqrt x)-10$
=$5\sqrt x+14\sqrt x-10$
=$(5+14)\sqrt x-10$
=$19\sqrt x-10$
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 1-8 - Cumulative Review - Page 679: 62
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