The Binomial theorem has extensions to more than two variables. The next interesting case is the Trinomial theorem, which connects naturally to triangular numbers and whose coefficients related to three dimensional paths. There is a lovely three dimensional analog of Pascal's array.
This video belongs to Wildberger's MathFoundations series.
really awesome!
andreirocks1992 2 months ago in playlist More videos from njwildberger
Nicely explained.
niloxxx007 9 months ago
Fascinating lecture!
EclecticSceptic 10 months ago