Precalculus (6th Edition) Blitzer

The degree of a polynomial s equal to the degree of the term with the highest degree, The degree of a term with one variable is equal to the exponent of the variable. Thus, the terms of the given polynomial have the following degrees: First term: $3$ Second Term: $2$ Third Term: $0$ ( the degree of a constant is 0) The highest degree is 3, therefore the degree of the polynomial is $3$.