Consider the following polynomial functions: f(m) = (-9 + 5m + 2m2) and gfm) = (6 - m). Which of the following statements about the polynomial functions are true? Select all that apply. A. The expression that represents the difference of the polynomials illustrates that polynomials are closed under subtraction.

B. The difference of f(m) and g(m) can be represented by the expression 2m2 + 4m – 15.

c. The expression that represents the sum of the polynomials is a third degree polynomial.
d. The sum of f(m) and g(m) can be represented by the expression 2m2 + 4m – 3.

e. The product of f(m) and g(m) can be represented by the expression -2m3 + 7m2 +39m – 54.​