y'=[(x-2)]'(3x+1)+(x-2)[(3x+1)]' =3(x-2)[(x-2)]'(3x+1)+(x-2)*2(3x+1)*[(3x+1)]' =3(x-2)(3x+1)+6(x-2)(3x+1) =3(x-2)(3x+1)(5x-3)