Answer:
11
Explanation:
The degree of a polynomial is he highest of the degrees of its monomials (individual terms) with non-zero coefficients.
You are given the polynomial

It consists of 4 terms:
The degrees are: 
- of the first term is 
  
- of the second term is 
  
- of the third term is 
  
- of the fourth term is 
  
The greatest degree is 11.