G(x) = x+3 (fog)(x) = x^2-4 f(x)=…… pake cara mksh

g (x) = x + 3

Misalkan g(x) = a

a = x + 3

a – 3 = x

x = a – 3

fog (x) = x^2 – 4

f (g(x)) = x^2 – 4

f (a) = (a – 3)^2 – 4

= a^2 – 6a + 9 – 4

= a^2 – 6a + 5

f (x) = x^2 – 6x + 5