Thinking Mathematically (6th Edition)

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: 43

Answer

$2\sqrt5$

Work Step by Step

Combine like terms to find: $=(1+1)\sqrt{5} \\=2\sqrt{5}$
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