College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter R - Section R.7 - Rational Expressions - R.7 Assess Your Understanding - Page 70: 4

Answer

$(\mathrm{a})$

Work Step by Step

(a) we can factor out -1 from the denominator, $\displaystyle \frac{a-b}{b-a}=\frac{(a-b)}{-(a-b)}=$ ... cancel $(a-b)\quad=-1$ (b) cancels to 1 (c) and (d) have no common factors... cannot be simplified.
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