Answer:If (f•g) (x):(f•g) (x)=3x² - 10x - 8if (f+g) (x):(f+g) (x)=4x - 6Step-by-step explanation:f (f•g) (x)(f•g) (x)=f(x) • g(x)(f•g) (x)=(3x + 2) (x - 4)(f•g) (x)=3x² - 12x + 2x - 8(f•g) (x)=(3x²) + (-12x + 2x) + (-8)(f•g) (x)=3x² - 10x - 8if (f+g) (x)(f+g) (x)=f(x) + g(x)(f+g) (x)=(3x + 2) + (x - 4)(f+g) (x)=4x - 6