ini gimana ya caranya sulit banget...

f(0)=7(0)³-4(0)²+6
=6
(d f(0))/dx=f'(0)
=21(0)²-8(0)
=0
maka
-3(d f(0))/dx) + 2 f(0)=-3(0)+2(6)
=12 (E)