Question

Even though I know some stuff, I am not to keen on functions. What do we do when f(x)=x^2 - 3x + 4, and I need to find f(2x). How do you do it? Don't give the answer, just wondering how, not what!

Answer 1

To get `f(2x)`, simply replace all instances of `x` in `f(x)` with `2x`.