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: 58

Answer

$\dfrac{12\sqrt5}{5}$

Work Step by Step

Rationalize the denominator by multiplying $\sqrt5$ to both the numerator and the denominator: $=\dfrac{12\sqrt5}{\sqrt5(\sqrt5)} \\=\dfrac{12\sqrt5}{5}$
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