So the degree of a polynomial is by the term with the highest combined power. In this case, the term with the highest combined power is
![-6x^3y^2](https://img.qammunity.org/2019/formulas/mathematics/college/lgo8ws166i628i746c7dpp0h6lphqv6na3.png)
. With this term, add 3 and 2 together since they are the two powers in this term, which make 5.
And because the combined powers equal 5, this polynomial is 5th degree.