Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 6 - Rational Expressions and Equations - 6.4 Addition and Subtraction with Unlike Denominators - 6.4 Exercise Set - Page 401: 81

Answer

Simplification.

Work Step by Step

Any common denominator will work when trying to add or subtract any fractions. However, if the denominator is not the least common denominator, there will be more simplification required later in the problem, so the least common denominator is ideal.
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