You can put this solution on YOUR website! f(x) = x^2 - x + 2
This tells me nothing. You were given a function.
Usually when this happens, there is a number or a list of numbers given to replace x with. I see that no number was given to you. So, my conclusion is that there is a typo here. Go back and post the entire question or else no one can solve this problem for you.
NOTE: x^2 means x squared or x to the second power.