Question

Sendo f(x)= -x³+5x-1, calcule f(0) - f(-1) + 3f(2)

Answer 1

f(0)=-(0)³+5.0-1=0+0-1=-1
f(-1)=-(-1)³+5.(-1)-1=-(-1)-5-1=1-5-1=-5
f(2)=-(2)³+5(2)-1=-(8)+10-1=-8+10-1=1

f(0)-f(-1)+3f(2)=
-1-(-5)+3.1=
-1+5+3=7