Jawabanmu

2014-04-13T05:17:46+07:00
(gof)(x) = g(f(x)) 5x^2 -10x+8 = 5 (fx) +3 5x^2 - 10x + 5 = 5f(x) fx = x^2 - 2x + 1
2014-04-13T08:14:19+07:00
g(x)=5x+3
(g。f)(x)=5x^2-10x+8,
maka f(x)=
g (f(x)) =5x
²-10x +8
5 f(x) + 3 =5x²-10x +8
f(x) =5x² -10x + 5
             5
f(x) = x²-2x +1