He considered three binomial equations, nine trinomial equations, and seven tetranomial equations. A trinomial equation is a polynomial equation involving three terms. In elementary algebra, a trinomial is a polynomial consisting of three terms or monomials. Chriss helped extend their work from binomial to trinomial trees. Chapter 9 considers trinomial factors in polynomials. The numbers of the tetrahedron are derived from trinomial expansion. Right quaternions may be put in what was called the standard trinomial form. The trinomial triangle is a variation of Pascal's triangle. In 1941, Reginald Pocock subordinated it to "Canis lupus" under the trinomial "Canis lupus pallipes". Some states use variations of the trinomial system. Opinions with dimensions larger than trinomial do not lend themselves to simple visualisation. Rather, it comes about through the two-step trinomial expansion process. The numbers of the Tetrahedron can also be found in the Trinomial Distribution. Trinomial opinions can be simply visualised as points inside a tetrahedron. The variations in widespread birds across geographical regions caused the introduction of trinomial names.