Answer
$2|x|\sqrt{5x}$
Work Step by Step
Factor the radicand so that one factor is a perfect square:
$\sqrt{4x^2(5x)}
\\=\sqrt{(2x)^2(5x)}
\\=2|x|\sqrt{5x}.$
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.