A binomial is defined as which of the following?

• A. Polynomial with two terms
• B. Monomial with two variables
• C. Polynomial with three terms
• D. Single term

Answer: (A)

A binomial is a polynomial that has exactly two terms. A polynomial is formed by adding or subtracting monomials, and a binomial is the special case where there are two such terms. The terms can involve any variables, for example 3x^2 + 5 or 4a − 7b^3 are binomials. This is different from a monomial, which has a single term like 6x^2 or 7, and from a trinomial, which has three terms like x^2 + x + 1. So the defining idea is two terms.