#### Answer

(x+4)(x+5)

#### Work Step by Step

5 plus 4, or $b$ in $ax^{2} + bx+ c$, is 9, and 5 times 4, or $c$ is 20.

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

(x+4)(x+5)

5 plus 4, or $b$ in $ax^{2} + bx+ c$, is 9, and 5 times 4, or $c$ is 20.

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.