diketahui fungsi f(x)=2x-6 dan g(x)=2x²-8x+8,maka (g°f)(x) adalah

gof(×) = 2(2x-6)^2 -8(2x-6)+ 8
=2(4x^2-24x+36) - 16x+48+8
=8x^2-48x+72-16x+56
=8x^2-64x+128

(gof)(x)
g(f(x)
g(2x-6)=2(2x-6)^2-8(2x-6)+8
g(2x-6)=2(4x^2-24x+36)-16x+48+8
=8x^2-48x+72-16x+48+8
=8x^2-64x+128
=x^2-8x+16