Jika diberikan fungsi f(x)=x kuadrat-5x+2,maka nilai f(4)-f(1)=

F(x)=x kuadrat-5x+2
f(4)-f(1) . . .?
=(4)kuadrat-5x+2-(1)kuadrat 5(1)+2
=16-20+2-1-5
=-6