## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$\color{red}{\text{This expression is a polynomial}}$.
Remember that a term is considered as a monomial ONLY IF it is a PRODUCT of constants and/or variables. In this item, the term is $-10$ and this can be considered as a monomial. Therefore, $\color{red}{\text{this expression is a polynomial}}$.