Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 2 - Real Numbers - 2.2 - Addition and Subtraction of Rational Numbers - Concept Quiz 2.2 - Page 57: 8



Work Step by Step

The denominators of the two fractions being added are $ab$ and $bc$, respectively. Since each of these contain the factor $b$, $b$ must be a factor of the least common denominator. Since $ac$ does not include $b$, this is not the least common denominator.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.