Answer
$2\sqrt5$
Work Step by Step
Combine like terms to find:
$=(1+1)\sqrt{5}
\\=2\sqrt{5}$
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 5 - Number Theory and the Real Number System - 5.4 The Irrational Numbers - Exercise Set 5.4 - Page 296: 43
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