Jawabanmu

2014-04-19T14:03:54+07:00
(gof)(x) = 4x^2 -24x +32
g(f(x))   =
4x^2 -24x +32
g(2x - 4) = (2x - 4)^2 - 16 - 8x + 32
             = (2x -4)^2 - 8x + 16
             = (2x -4)^2 - 4(2x - 4)
g(x)        = x^2 - 4x  (jawaban E)