Hello!

This is a question about ratio and proportion, which I've tried to solve, but got the wrong answer. The correct answer is apparently 2, but I got someting like 0.0042 - and I am not sure what I did wrong.

Therefore, I would appreciate your help

The question is:

a+b = 1/6

((a-b)^2 + ab) / ((3a^3) + (3b^3)) = ?

Thanks!