Jawabanmu

2014-05-30T23:48:31+07:00
Fog = f(g(x))
fog = 2(4-x) + 5
fog = 8 - 2x + 5
fog = -2x + 13

gof = g(f(x))
gof = 4 - (2x+5)
gof = 4 - 2x - 5
gof = -2x-1