Tolong yaa nomor 2 dan 3 .... poin 20 jangan jawab asalan

2. f(x) = 2x-1
g(x) = x^2+3x+1
=> (gof) (x) = (2x-1)^2 +3(2x-1) +1
= (4x^2 -4x +1)+(6x -3)+1
= 4x^2 +2x -1
3. f(x) = (2x -3)/(-x +2)
g(x) = x +1
=> (fog) (x) = [2(x +1)-3] / [-(x+1)+2]
= (2x +2-3) / (-x -1+2)
= (2x -1) / (-x +1)
=> (fog) (3) = [2(3)-1] / [-(3)+1]
= 5/ -2 atau -2 1/2
Dikoreksi lagi jika ada kekeliruan dalam jawaban saya.