Standard form: $-2x^3$ Degree = 3 Number of terms = 1 Thus, the polynomial is a cubic monomial.
Work Step by Step
Distribute $x^2$ to have: $=3x^4-2x^3-3x^4$ Combine like terms to have $\\(3x^4-3x^4)-2x^3 \\=0 - 2x^3 \\=-2x^3$. This polynomial has degree 3 and has one term. Thus, it is s cubic monomial.