## Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Polynomials consist of one or more monomials and have the form: $$a_nx^n+a_{n-1}x^{n-1}++ a_1x+a+0$$ where $x$ is the variable, $a_n$ is the leading coefficient, and $n$ is a non-negative integer called the degree. Thus, we see that the expression $1-4x$ is a polynomial of degree 1.