How do you expand #(x-y)^4#? Precalculus The Binomial Theorem Pascal's Triangle and Binomial Expansion 1 Answer S.S Nov 9, 2016 #(x-y)(x-y)(x-y)(x-y)# Explanation: #(x-y)^2 = (x-y)(x-y)# The rule applies to higher powers as well so #(x-y)^3 = (x-y)(x-y)(x-y)# and #(x-y)^4 = (x-y)(x-y)(x-y)(x-y)# Answer link Related questions What is Pascal's triangle? How do I find the #n#th row of Pascal's triangle? How does Pascal's triangle relate to binomial expansion? How do I find a coefficient using Pascal's triangle? How do I use Pascal's triangle to expand #(2x + y)^4#? How do I use Pascal's triangle to expand #(3a + b)^4#? How do I use Pascal's triangle to expand #(x + 2)^5#? How do I use Pascal's triangle to expand #(x - 1)^5#? How do I use Pascal's triangle to expand a binomial? How do I use Pascal's triangle to expand the binomial #(a-b)^6#? See all questions in Pascal's Triangle and Binomial Expansion Impact of this question 11563 views around the world You can reuse this answer Creative Commons License