Diketahui f(x) = 3x + 5 dan g(x) = 4x - 3. Tentukanlah (f-g) (x) dan (g-f) (x)

a. (f-g)(x) =( 3x+5) - (4x-3) = (3x-4x) +(5- -3) = -x+8 = 8-x

b. (g-f)(x) = (4x-3)-(3x+5) = (4x-3x)+(-3-5) = x-8