Answer:
Polynomials are classified according to their number of terms. 4x3 +3y + 3x2 has three terms, -12zy has 1 term, and 15 - x2 has two terms. As already mentioned, a polynomial with 1 term is a monomial. A polynomial with two terms is a binomial, and a polynomial with three terms is a trinomial.
The answer is 21.
I am not sure if you're looking for the answer, or the steps... get back to me foor help.
Tbh idk I believe that the answer is 12