Work Step by Step
RECALL: $(a+b)(a-b) = a^2-b^2$ Multiply the given expression using the formula above with $a=3x$ and $b=5y$ to obtain: $=(3x)^2-(5y)^2 \\=9x^2-25y^2$
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.