Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 11 - Rational Expressions and Functions - 11-4 Adding and Subtracting Rational Expressions - Lesson Check - Page 687: 6

Answer

See below

Work Step by Step

Both involve finding the LCM by prime factorization and then multiplying them to find the LCD. They are different because the variables are included for rational expressions.
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