Factorisation is a method of factoring a number or a polynomial. The polynomials are decomposed into products of their factors. A trinomial is an expression that contains three terms. When you expand binomials such as (x+2)(x-5), you get an answer in the form of a trinomial: x2-3x-10 The inverse process of writing trinomials into the product of two binomials is called factorisation. Algebra tiles are mathematical manipulatives that allow learners to better understand ways of algebra thinking and the concepts of algebra. Each file is based on area as outlined below: NAME MODEL​