|Class 7 Maths Algebraic Expressions||Monomials, Binomials, Trinomials and Polynomials|
Monomials, Binomials, Trinomials and Polynomials
An expression with only one term is called a monomial.
Ex: 2x, 5xy, -3p, 4y2, -7, etc are called monomials.
An expression which contains two unlike terms is called a binomial.
Ex: p + 2q, m – 2n, x2 – y2, etc are called binomials.
An expression which contains three terms is called a trinomial.
Ex: a + b + 5, 2p + 3q – 5r, 3x2 – 5y + 10z are trinomials.
An expression which has one or more terms is called a polynomial. Thus a monomial, a binomial and a trinomial are all polynomials.
Problem: Classify into monomials, binomials and trinomials:
(i) 4y – 7x (ii) y2 (iii) x + y - xy (iv) 100 (v) ab – a - b (vi) 5 – 3t
(vii) 4p2 q – 4pq2 (viii) 7mn (ix) z2 – 3z + 8 (x) a2 + b2 (xi) z2 + z (xii) 1 + x + x2