Algebra: A Combined Approach (4th Edition)

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

Chapter 7 - Section 7.1 - Simplifying Rational Expressions - Exercise Set: 25

Answer

$-1$

Work Step by Step

$\dfrac{x-7}{7-x}$ Rewrite the denominator by changing its sign. To do so, also change the sign of the fraction. After that, simplify: $\dfrac{x-7}{7-x}=-\dfrac{x-7}{x-7}=-1$
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