Answer
$22\sqrt 2$
Work Step by Step
$5\sqrt 8+2\sqrt 72$
$=5.2\sqrt 2+2.6\sqrt 2$
$=\sqrt 2(10+12)$
$=22\sqrt 2$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 10 - Radical Expressions and Equations - 10-3 Operations With Radical Expressions - Practice and Problem-Solving Exercises - Page 629: 20
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