diket: f(x): x-5 g(x): x² Ditanya: a) fog(x) dan gof(x) b) (fog)(-2) dan (gof)(3)

a. fog= x-5
=x^2-5

gof=x^2
=(x-5)(x-5)
=x^2-5x-5x+25
=x^2-10x+25

b.fog(-2)
=x^2-5
=-2^2-5
=-1

gof(3)
3^2-10*3+25
9-30+25
=4