f(x) x-10 g(x) x2+x tentukan (gof)(x) dan (fog)(x) ?

(gof)(x)=g(f(x))
=g(x-10)
=(x-10)2+(x-10) angka 2 diblkang maksudx pangkat yh
=(x-10).(x-10)+x-10
=x2-10x-10x+100+x-10
=x2-10x-10x-x+100-10
=x2-21x+90

(fog) (x)=f(g(x))
=f(x2-x)
=(x2-x)-10