# Chapter 10 - Review: 30

$49a^2+14a+1$

#### Work Step by Step

Use the FOIL method. $(7a+1)^2=(7a+1)(7a+1)=49a^2+7a+7a+1=49a^2+14a+1$

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.