= Trinomial triangle
{wiki=Trinomial_triangle}
The trinomial triangle is a mathematical structure similar to Pascal's triangle, but instead of summing the two numbers directly above a position to find the number below, it sums three numbers. Each entry in the trinomial triangle represents a coefficient related to the expansion of trinomial expressions. To construct a trinomial triangle: 1. Start with a single element at the top (the apex) of the triangle, typically the number 1.
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