Answer
$\dfrac{-5+10\sqrt{7}}{5}=2\sqrt{7}-1$
Work Step by Step
$\dfrac{-5+10\sqrt{7}}{5}$
Take out common factor $5$ from the numerator and simplify:
$\dfrac{-5+10\sqrt{7}}{5}=\dfrac{5(-1+2\sqrt{7})}{5}=2\sqrt{7}-1$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 10 - Section 10.4 - Adding, Subtracting, and Multiplying Radical Expressions - Exercise Set - Page 711: 84
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