|Monomial||Any expression which has only one term.||5x2, 7y, 3ab|
|Binomial||Any expression which has two, unlike terms.||5x2 + 2y, 2ab – 3b|
|Trinomial||Any expression which has three, unlike terms.||5x2 + 2y + 9xy, x + y – 3|
|Polynomial||Any expression which has one or more terms with the variable having non-negative integers as an exponent is a polynomial.||5x2 + 2y + 9xy + 4 and all the above expressions are also polynomial.|
All the expressions like monomial, binomial and trinomial are also polynomials.