Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 7 - Section 7.4 - Adding and Subtracting Rational Expressions with Different Denominators - Exercise Set - Page 518: 90

Answer

The first step to adding rational expressions with different denominators is to find the LCD(Least Common Denominator) between the two denominators. Once you have found the LCD you need to multiply each term by the division between the LCD and the denominator of the term. After this, all terms should have the same denominator, so you can subtract the numerators while keeping the same value as your denominator. Lastly just simplify the answer.

Work Step by Step

In this problem you need to explain using words so the answer is : The first step to adding rational expressions with different denominators is to find the LCD(Least Common Denominator) between the two denominators. Once you have found the LCD you need to multiply each term by the division between the LCD and the denominator of the term. After this, all terms should have the same denominator, so you can subtract the numerators while keeping the same value as your denominator. Lastly just simplify the answer.
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