Answer
$2x^3 + 5x^2 - x + 9$;
$\text{cubic polynomial of four terms}$
Work Step by Step
To figure the degree of a polynomial, we look to the term with the highest power. Let's rewrite this expression in standard form, or in terms of descending powers:
$2x^3 + 5x^2 - x + 9$
In this polynomial, the term $2x^3$ has the highest power. A third degree polynomial can be called "cubic." There are four terms in this polynomial, with the highest term being cubic, so we call it a cubic polynomial of four terms. There is no special name for a polynomial with more than three terms.
