Final answer:
The given expression, 9pq + 8, is a binomial.
Step-by-step explanation:
A polynomial is an expression that consists of variables, coefficients, and mathematical operations such as addition, subtraction, and multiplication. The number of terms in a polynomial determines its classification. A monomial has one term, a binomial has two terms, and a trinomial has three terms. If a polynomial has more than three terms, it is referred to as a polynomial with more than three terms.
In the given expression, 9pq + 8, there are two terms, namely 9pq and 8. Therefore, it is classified as a binomial.