Answer
$8\sqrt{5}$
Work Step by Step
$\sqrt{20} +6\sqrt{5}$
By the Product Rule for Square Roots
$=(\sqrt{4} \cdot \sqrt{5}) + 6\sqrt{5}$
$=2\sqrt{5} + 6\sqrt{5}$
By the Distributive Property
$=(2+6)\sqrt{5}$
$=8\sqrt{5}$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.3 - Page 48: 38
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