College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter P, Prerequisites - Section P.7 - Rational Expressions - P.7 Exercises: 1

Answer

(a) rational (b) not rational (c) rational

Work Step by Step

(a) $\displaystyle \frac{3x}{x^{2}-1}$ is a rational expression because it is a ratio of two polynomials. (b) $\displaystyle \frac{\sqrt{x+1}}{2x+3}$ is not a rational expression because the numerator $\sqrt{x+1}$ is not a polynomial. (c) $\displaystyle \frac{x(x^{2}-1)}{x+3}=\frac{x^{3}-x}{x+3}$ is a rational expression because it simplifies to a ratio of two polynomials.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.