guardianneangel guardianneangel 05-08-2017 Mathematics contestada PLEASE HELP!!!!!!! f(x)=x^2−3x+9 g(x)=3x^3+2x^2−4x−9 Find (f−g)(x) Select one: a. −3x^3−x^2+x+18 b. 3x^3+3x^2−7x c. 3x^3+x^2−x−18 d. 3x^3−x^2−x