yang bisa jenius banget

(gofl(x) = 3(x²-4x+2)-y = 3x²-12x+6-y

f(x) =2x-1/4x-1
y = 2x-1/4x-1
4xy-y = 2x-1
4xy-2x = y-1
x(4y-2) = y-1
x = y-1/4y-2
f'(x) = x-1/4x-2 ..

Semoga bermanfaat .. Itu ko saya gak salah hitung, kalo salah hapus saja ..