The given expression is a polynomial whose degree is $2$.
Work Step by Step
The variable in the given expression has exponents of $1$ and $2$, which are both non-negative integers. Thus, the given expression is a polynomial with two terms. The degree of a non-zero polynomial in one variable is equal to the degree of the term with the highest degree. The first term has a degree of $2$ while the second term has a degree of $1$. Thus, the degree of the polynomial is $2$.