Work Step by Step
$x^2+4x+4=x^2+2\cdot x\cdot2+2^2=(x+2)^2$, thus the answer is f
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.