Answer
$$a=4,\:a=-5$$
Work Step by Step
In order to solve the equation, we first simplify both sides of the equation. Next, we isolate the variable. Doing this, we find:
$$ 9a+a^2=8a+20 \\ a^2+a-20=0 \\ (a+5)(a-4)=0 \\ a=4,\:a=-5$$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 5 - Polynomials and Factoring - 5.7 Solving Quadratic Equations by Factoring - 5.7 Exercise Set - Page 353: 79
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.
