\( P = \frac{x \sqrt{2}}{\sqrt{2x} (\sqrt{2} + \sqrt{x})} - \frac{\sqrt{2} \cdot \sqrt{x-1}}{(\sqrt{x} - \sqrt{2})(\sqrt{x} + \sqrt{2})} \)

Làm giúp tui câu này vs
----- Nội dung ảnh -----
\( P = \frac{x \sqrt{2}}{\sqrt{2x} (\sqrt{2} + \sqrt{x})} - \frac{\sqrt{2} \cdot \sqrt{x-1}}{(\sqrt{x} - \sqrt{2})(\sqrt{x} + \sqrt{2})} \)