Question

sea f(x)=x^2-2x y g(x)=x+5
(fog)(x)=



(gof)(x)=

Answer 1

Okay okay...

(fog)(x)= f(g(x)) = (x+5)^2 - 2(x+5)
 = x^2 + 10x + 25 - 2x -10
 =x^2 + 8x +15

(gof)(x)= g(f(x)) = (x^2-2x) + 5
=x^2 - 2x +5