Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 7 - Section 7.1 - Radical Expressions and Functions - Exercise Set - Page 512: 46



Work Step by Step

The square of a binomial sum is: $(A-B)^2=A^2-2AB+B^2$. $\sqrt[n] {a^n}=|a|$ if $n$ is even. Hence here: $-\sqrt{x^2-10x+25}=-\sqrt{(x-5)^2}=-|x-5|$
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