Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 7 - Rational Functions - 7.4 Adding and Subtracting Rational Expressions - 7.4 Exercises - Page 588: 3

Answer

LCD = $900n^2p$ $\frac{35m}{900n^2p}$ $\frac{24n^3}{900n^2p}$

Work Step by Step

The first thing we want to do is to factor each denominator completely: $\frac{7m}{3 • 3 • 2 • 2 • 5 • n^2 • p}$ $\frac{4n}{3 • 5 • 5 • 2 • p}$ Next, we want to take the highest power of each factor in the denominator: LCD = $3^2 • 2^2 • 5^2 •n^2 • p$ Multiply the factors out: LCD = $9 • 4 • 25 •n^2 • p$ Simplify: LCD = $900n^2p$ Now that we have the least common denominator, we multiply the numerators of each fraction with the factors it is missing in the denominator: $\frac{7m • 5}{900n^2p}$ $\frac{4n • 3 • 2 • n^2}{900n^2p}$ Simplify the fractions: $\frac{35m}{900n^2p}$ $\frac{24n^3}{900n^2p}$
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