A few weeks ago I posted this “powerful” problem:

Solve

Now, allow me to give you a major hint. Consider the simpler equation

What are the possible values of and ? Here are the possible combinations:

- and is anything
- and is any nonzero number

And here’s the tricky one that most people forget:

- and is even

You now have enough information to solve the original equation. I think you’ll be delighted with the solution!