[tex]\bf 3x^3+4x^2-7\quad
\begin{cases}
3x^3\impliedby &3rd~degree\\
4x^2\impliedby &2nd~degree\\
7\impliedby &0~degree
\end{cases}[/tex]
notice, there are three terms, therefore is a trinomial.
the term that has the highest degree, has a degree of 3, therefore the degree of the polynomial as a whole is 3, or a cubic degree.
so, is a cubic trinomial.
