Answer
$\dfrac{5\sqrt{7}}{7}$
Work Step by Step
Rationalize the denominator by multiplying $\sqrt7$ to both the numerator and the denominator to have:
$=\dfrac{5}{\sqrt7} \cdot \dfrac{\sqrt{7}}{\sqrt{7}}
\\=\dfrac{5\sqrt{7}}{7}$
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter R - Algebra Reference - R.7 Radicals - R.7 Exercises - Page R-29: 27
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