[tex]x^{5} + 1 -3x^{4} + 3x^{9} - 2x [/tex]
= [tex]3x^{9} + x^{5} - 3x^{4} - 2x + 1[/tex]
The degree of a polynomial is the highest degree of its monomials with non-zero coefficients.
Hence, the degree of the above polynomial is 9.
Hence, the answer is A.
