What are the instructions? If it just says to classify it, there is no degree, so it would be a binomial.
Here is a chart;
1 term = monomial. Example; 6x
2 terms = binomial. Example; 6x + 5
3 terms = Trinomial. Example; 6x + 5 + 2y
4 terms = polynomial of 4 terms. Example; 6x + 5 + 2y + 2x^3
