Answer
$\dfrac{\sqrt{35}}{7}$
Work Step by Step
Rationalize the denominator by multiplying $7$ to both the numerator and denominator inside the radical sign to find:
$=\sqrt{\dfrac{5(7)}{7(7)}}
\\=\sqrt{\dfrac{35}{7^2}}
\\=\dfrac{\sqrt{35}}{7}$
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: 66
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