For this case we have that by definition, a polynomial in its standard form is given by:

Where:
a, b, c, d, e, f: They are the coefficients
n, n-1,3,2,1: They are the exponents. The degree of the polynomial is "n" because it is the largest exponent.
x: It is the variable
The given polynomial is:

Rewriting it in its standard form:

It is a polynomial of degree 4
ANswer:
