Rút gọn biểu thức P=(2√xy/x−y−√x+√y/2√x−2√y)⋅2√x/√x−√y (với x ≥ 0; y ≥ 0; x ≠ y)

\(\frac{{2\sqrt {xy} }}{{x - y}} - \frac{{\sqrt x + \sqrt y }}{{2\sqrt x - 2\sqrt y }} = \frac{{ - \left( {\sqrt x - \sqrt y } \right)}}{{2\left( {\sqrt x + \sqrt y } \right)}}\)

\(\frac{{ - \left( {\sqrt x - \sqrt y } \right)}}{{2\left( {\sqrt x + \sqrt y } \right)}}.\frac{{2\sqrt x }}{{\left( {\sqrt x - \sqrt y } \right)}} = \frac{{ - \sqrt x }}{{\left( {\sqrt x + \sqrt y } \right)}}\)