Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 6 - Rational Expressions and Equations - 6.1 Rational Expressions - 6.1 Exercise Set - Page 380: 61


Multiplying any number by 1 is equal to the original number.

Work Step by Step

Since multiply a number by one is the same as the original number, we can cancel expressions like $\frac{4x^2}{4x^2}$, which are equal to one and hence can be removed without changing the value of the expression.
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