Intermediate Algebra for College Students (7th Edition)

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

Chapter 6 - Section 6.2 - Adding and Subtracting Rational Expressions - Exercise Set - Page 427: 20



Work Step by Step

$x+3=x+3$, $x^2-9=(x+3)(x-3)$, so the GCF is $x+3$ and the terms that are "not common" are $x-3$ so LCD$=(x+3)(x-3)=x^2-9$
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