F(x)=4/9-x f(x)=-4 f(x)=2
F(-4)=4/9+4 f(-4)=4/9+36/9 f(-4)=40/9=4 4/9 f(2)=4/9-2 f(2)=4/9-18/9 f(2)=-14/9
вроде так