Polynomials can be classified by the number of terms they have.
A function with only one term, for example "3x⁵" is a monomial.
If you add/subtract two monomials you determine a "binomial"
[tex]3x^5+2x^4[/tex]If there are three terms (or monomials) is a "trinomial"
[tex]3x^5+2x^4-4x^3[/tex]The given polynomial is
[tex]2x^3[/tex]Since it has only one term, it can be classified as a "Monomial"