Chapter 7 - Polynomial Equations and Factoring - 7.1 - Adding and Subtracting Polynomials - Exercises - Page 362: 22

The given polynomial is a binomial. Its degree is $8$.

Given that the polynomial is $400x^{8}+600x^{6}$. Since the number of terms in this polynomial is two, it is classified as a binomial. The greatest degree of the terms in a polynomial is called the degree of it. In this case, it is $8$.