Cambridge Maths Academy

Pure mathematics Year 1 Table of contents Binomial, trinomial and polynomial Binomial expansion Pascal's triangle Examples Edexcel P1 Ch8 Exercise 8A 1. Binomial, trinomial and polynomial The binomial expansion tells us how to expand $(a+b)^n$. The word 'bi-nomial' means 'two terms' - here, they are $a$ and $b$. Similarly, monomial means 'one term', trinomial means 'three terms' and polynomial m..