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: 14

Answer

$\frac{15-20}{y-4}$=$\frac{-5}{y-4}$

Work Step by Step

$\frac{15}{y-4}$+$\frac{20}{4-y}$= $\frac{15}{y-4}$+$\frac{20(-1)}{(4-y)(-1)}$= $\frac{15}{y-4}$+$\frac{-20}{y-4}$= $\frac{15-20}{y-4}$=$\frac{-5}{y-4}$
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