Elementary Algebra

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

Chapter 7 - Algebraic Fractions - 7.4 - Addition and Subtraction of Algebraic Fractions and Simplifying Complex Fractions - Concept Quiz 7.4 - Page 299: 4



Work Step by Step

By a form of one, the book means expressions like $\frac{x}{x}$. While this is not the number one, it simplifies to one. Since one times any number is the original number, it is just as valid to multiply the entire expression by $\frac{x}{x}$ as by 1. Thus, forms of one can be useful during the simplification process.
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