Work Step by Step
The GCF of the coefficients is 4, and the GCF of the variables is $a^2$, so the GCF of the expression is $4a^2$.
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.