The degree of a polynomial is the highest degree of any of its monomials.
Examples
The degree of the monomial 10a7b3c2 is 12, since: 7 + 3 + 2 = 12.
The degree of the polynomial 4x² − 7x + 15 is 2.
The degree of the polynomial 6x3y2 − x2y4 + 2xy + 3 is 6.