Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 7 - Section 7.1 - Rational Expressions and Their Simplification - Exercise Set - Page 493: 94


We search for numbers for which the denominator yields zero.

Work Step by Step

Rational expressions indicate division and division by zero is undefined. This means that we must exclude any value or values of the variable that make a denominator zero. If a variable in a rational expression is replaced by a number that causes the denominator to be 0, that number must be excluded as a replacement for the variable.
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