help

[frozen pagoda]

1. Wait patiently for a helper to come along.
2. Once someone helps you, say thank you and close the thread with:

+close

3. Feel free to nominate the person for helper of the week in #helper-nominations
4. Do not ping the mods, unless someone is breaking the rules.
5. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[silver badger]

He's looking for x+2/x-2 in that expression

So he needs to find x-2/x+2 by using 1/(8x/(x-2)²)

However he only needs x-2 not (x-2)²

So he also must find a way to remove this issue

When you consider all these factors the search becomes more straightforward

[icy ledge]

Yeah.
Though, if you're having trouble, you could always solve it the usual way:

1. Set t = (x + 2)/(x - 2).
2. Express x as a function of t.
3. Substitute that expression of x into f((x + 2)/(x - 2)) = (expression), which will yield f(t) = (needed expression).

[silver badger]

This is more straightforward, thanks for the idea

[sand crater]

@silver badger has given 1 rep to @icy ledge