Answer
$2\sqrt {5}-5\sqrt {3}+5\sqrt 7$
Work Step by Step
$\sqrt {20}-\sqrt {75}+5\sqrt 7$
=$\sqrt {4\times5}-\sqrt {25\times3}+5\sqrt 7$
=$(\sqrt 4\times \sqrt 5)-(\sqrt {25}\times\sqrt 3)+5\sqrt 7$
=$2\sqrt {5}-5\sqrt {3}+5\sqrt 7$
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 10.5 - Integrated Review - Radicals and Rational Exponents - Page 721: 29
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