Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 8 - Section 8.3 - Operations with Radicals - Exercise Set: 19

Answer

$7\sqrt{7}$

Work Step by Step

RECALL: For any real numbers $a, b,c$ and $d$, $ad-bd+cd=(a-b+c)d$ Use the rule above to combine like terms: $=(4-5+8)\sqrt{7} \\=(-1+8)\sqrt{7} \\=7\sqrt{7}$
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