mohon dijawab sulit banget

jawab

(8)
f(x) = x²
fog(x) = x² - 2x + 1
f{g(x)| = x² - 2x + 1
g²(x) = x² -2x + 1 = (x-1)²
g(x)= x-1
g(3) = 3-1
g(3) = 2

(9)
f(x)= x+2
g(x)= 3x² + 4x+ 1
gof(x)= g{f(x)}
gof(x) = g(x+2)
= 3(x+2)²  + 4(x+2) + 1
= 3(x² + 4x + 4)+ 4x + 8 + 4
= 3x² + 12x + 12 + 4x + 12
= 3x² + 16x + 24