Answer
$$16x^4-96x^3y+216x^2y^2-216xy^3+81y^4$$
Work Step by Step
Using the binomial expansion theorem, we can expand the binomial without multiplying it out. Doing this, we find:
$$16x^4-96x^3y+216x^2y^2-216xy^3+81y^4$$
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.