Question

Q=\(\frac{\left(^{\sqrt{x}-\sqrt{y}}\right)^{2+\sqrt{xy}}}{\sqrt{x}+\sqrt{y}}\) : (\(\frac{x-y}{\sqrt{x}-\sqrt{7}}\)+\(\frac{x\sqrt{x}-y\sqrt{y}}{y-x}\))

Rút gọn Q, chứng minh Q>1