Respuesta :

easy, so just subsittute 2 for x and 4 for x in g(x) and f(x) respectively

so assume that in g(x) that 2x3=2x^3 then
g(2)-f(4)
2(2)^3-(6(4)-4)
2(8)-(24-4)
16-(20)
-4

the answer is -4