Question

if f(x) = x square - 5x+1 evalute f (2) - f(-1) +f(1upon3)

Answer 1

we have

f(2)=4-10+1=-5
f(-1)=1+5+1=7
f(1/3)=(1/9)-(5/3)+1=(-5/9)

now
 f(2)-f(-1)+f(1/3)=-5-7-(5/9)=(-113/9)

thanks