Tolong dong no 1,2,3

aku cuma bisa bantu nomer 3 aja

(f o g) (x) = f(g(x)) = (2x + 1)^2 - 3 (2x + 1) + 2 = 4x^2 + 4x + 1 - 6x - 3 + 2 = 4x^2 - 2x [D]