Oct 4, 2013 Thread starter Admin #1 M MarkFL Administrator Staff member Feb 24, 2012 13,775 Here is the question: How to expand this binomial expansion? a.) (x - 2y)^3 with the equation: (n over r) x [a^(n-r)] x (b^r) Thank you!!! Click to expand... I have posted a link there to this topic so the OP can see my work.