Answer
$3\sqrt{5}$
Work Step by Step
Using the properties of radicals, the given expression, $
2\sqrt{5}+\sqrt{5}
,$ simplifies to
\begin{array}{l}\require{cancel}
2\sqrt{5}+1\sqrt{5}
\\\\=
(2+1)\sqrt{5}
\\\\=
3\sqrt{5}
.\end{array}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 7 - Section 7.4 - Adding, Subtracting, and Multiplying Radical Expressions - Exercise Set - Page 440: 88a
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