Answer
$4x^2-16y^2$
Work Step by Step
Using $(a+b)(a-b)=a^2-b^2$ or the product of the sum and difference of like terms, the expression, $
(2x-4y)(2x+4y)
$, is equivalent to
\begin{array}{l}
(2x)^2-(4y)^2
\\\\=
4x^2-16y^2
.\end{array}
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.