Work Step by Step
The polynomial $ x^2+4x+4 $ is a complete square since it is of the form $a^2+2ab+b^2=(a+b)^2$. Thus, by putting $a=x$, $b=2$, we have $$ x^2+4x+4=(x+2)^2 .$$
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.