Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 7 - Algebraic Fractions - 7.3 - Adding and Subtracting Algebraic Fractions - Problem Set 7.3 - Page 291: 7



Work Step by Step

By inspection, we see that there is a common denominator of $4x^{2}$. Therefore, we obtain: $\frac{9}{4x^{2}}-\frac{13}{4x^{2}}$ $=\frac{9-13}{4x^{2}}$ $=\frac{-4}{4x^{2}}$ $=\frac{-1}{x^{2}}$ $=-\frac{1}{x^{2}}$
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