College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter R - Section R.7 - Rational Expressions - R.7 Assess Your Understanding - Page 71: 60


LCM = $x(x-3)(x+3)$

Work Step by Step

Step 1: Factor each polynomial completely. $(x-3)\quad $... is factored $x^{2}+3x=x(x+3)$ $x^{3}-9x=x(x^{2}-9)$ ... recognize a difference of squares $=x(x-3)(x+3)$ Step 2: The LCM is the product of each of these factors raised to a power equal to the greatest number of times that the factor occurs in the polynomials. LCM = $x(x-3)(x+3)$
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