Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 11 - Rational Expressions and Functions - Cumulative Test Prep - Multiple Choice - Page 710: 18

Answer

$I$

Work Step by Step

Given: $\dfrac{x^2-81}{2x^2+23x+45}$ As we know $(a^2-b^2)=(a-b)(a+b)$ Thus, $\dfrac{x^2-81}{2x^2+23x+45}=\dfrac{(x-9)(x+9)}{2x^2+18x+5x+45}$ $=\dfrac{(x-9)(x+9)}{(2x+5)(x+9)}$ $=\dfrac{(x-9)}{(2x+5)}$ Hence, the correct answer is $I$.
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.