Algebra: A Combined Approach (4th Edition)

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: 84

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: $\dfrac{-5+10\sqrt{7}}{5}=\dfrac{5(-1+2\sqrt{7})}{5}=2\sqrt{7}-1$
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