Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 11 - Rational Expressions and Functions - 11-4 Adding and Subtracting Rational Expressions - Practice and Problem-Solving Exercises - Page 688: 27


$ \frac{189-9n}{7n^{3}}$

Work Step by Step

Given : $\frac{27}{n^{3}} - \frac{9}{7n^{2}}$ This becomes : $\frac{27\times 7}{n^{3} \times 7} - \frac{9 \times n}{7n^{2}\times n}$ (Finding the least common denominator) $= \frac{189-9n}{7n^{3}}$
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