Answer
$(2z)^{2}$
Work Step by Step
$4z^{2}$
$=(2)(2)(z)(z)$
$=(2z)^{2}$
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.