Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 7 - Rational Functions - 7.4 Adding and Subtracting Rational Expressions - 7.4 Exercises - Page 588: 7

Answer

LCD = $(x + 6)(x + 5)$ $\frac{(x - 5)(x + 5)}{(x + 6)(x + 5)}$ $\frac{(x - 5)(x + 6)}{(x + 6)(x + 5)}$

Work Step by Step

The two fractions have already been factored completely. Next, we want to take the highest power of each factor in the denominators: LCD = $(x + 6)(x + 5)$ Now that we have the least common denominator, we multiply the numerators of each fraction with the factors it is missing in the denominator: $\frac{(x - 5)(x + 5)}{(x + 6)(x + 5)}$ $\frac{(x - 5)(x + 6)}{(x + 6)(x + 5)}$
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