If \(x = {{\sqrt5 - \sqrt4} \over {\sqrt5 + \sqrt4}}\) and \(y = {{\sqrt5 + \sqrt4} \over {\sqrt5 - \sqrt4}}\) then the value of \(x^2 - xy + y^2 \over x^2 +xy + y^2\) = ?
1
\(361 \over 363\)
2
\(341 \over 343\)
3
\(384 \over 387\)
4
\(321 \over 323\)