You can put this solution on YOUR website! functions are very straight forward. In the main, it is a more "professional" way of writing y= all the time.
f(x) = means exactly the same as .
f(-2) means x is -2, so put that value in the equation, to give f(-2) = .
You can work this out on your calculator to give a long decimal, that you have no idea what it means or where it came from, or you can do the manipulation by hand: it isn't difficult and it keeps the answer in a form you understand, so here goes:
