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: 19

Answer

$4\sqrt5$

Work Step by Step

Factor the radicand so that one factor is a perfect square: $=\sqrt{16(5)} \\=\sqrt{4^2(5)}$ Simplify the square root of the perfect square factor: $=4\sqrt5$
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