gánh còng não :v
\(\left(\dfrac{\sqrt{y}}{x+\sqrt{y}}+\dfrac{\sqrt{y}}{x-\sqrt{xy}}\right):\dfrac{2\sqrt{xy}}{xy}=\left(\dfrac{\sqrt{y}}{x+\sqrt{y}}+\dfrac{\sqrt{y}}{\sqrt{x}\left(\sqrt{x}-\sqrt{y}\right)}\right):\dfrac{2}{\sqrt{xy}}=\dfrac{\sqrt{xy}\left(\sqrt{x}-\sqrt{y}\right)+\sqrt{x}\left(x+\sqrt{y}\right)}{\sqrt{x}\left(x+\sqrt{y}\right)\left(\sqrt{x}-\sqrt{y}\right)}:\dfrac{2}{\sqrt{xy}}=\dfrac{x\sqrt{y}-y\sqrt{x}+x\sqrt{x}+\sqrt{xy}}{\sqrt{x}\left(x+\sqrt{y}\right)\left(\sqrt{x}-\sqrt{y}\right)}:\dfrac{2}{\sqrt{xy}}=\dfrac{\sqrt{x}\left(\sqrt{xy}-y+x+\sqrt{y}\right)}{\sqrt{x}\left(x+\sqrt{y}\right)\left(\sqrt{x}-\sqrt{y}\right)}:\dfrac{2}{\sqrt{xy}}=\dfrac{\sqrt{y}\left(\sqrt{x}-\sqrt{y}\right)+\left(x+\sqrt{y}\right)}{\left(x +\sqrt{y}\right)\left(\sqrt{x}-\sqrt{y}\right)}:\dfrac{2}{\sqrt{xy}}\) mình làm đc đó thôi ( mỏi tay :v )
cái phép tính của bạn bị mất nét ko pt là j
