+483 Let \(x\) and \(y\) be real numbers such that \(xy - \frac{x}{y^2} - \frac{y}{x^2} = 3.\)
Find the sum of all possible values of \((x-1)(y-1)\).
Any help would be appreciated! 
+118673 I don't really understand the wording of the question but if it means
\(xy - \frac{x}{y^2} - \frac{y}{x^2} = 3.\\~\\ and\\~\\ (x-1)(y-1)=k \)
Find all possible values of k then this graph indicates that there are no possible values of k.
