Answer
$81x^4-432x^3+864x^2-768x+256$
Work Step by Step
Use the Binomial Theorem, we have
$(3x-4)^4=(3x)^4+4(-4)(3x)^3+6(-4)^2(3x)^2+4(-4)^3(3x)+(-4)^4
=81x^4-432x^3+864x^2-768x+256$
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.