azzphat69 azzphat69 01-10-2021 Mathematics contestada f(x) = 4х + 7, g(x) = 3х^ 2 Find (fg)(x). (1 point) A. 12х^2 + 21х B. 3х^2 + 4х +7 C. 12x^3 + 21x^2 D. 12х +21