\left\{ \begin{array} { c } { \sqrt { x } + \sqrt { y } = 6 } \\ { \sqrt { x y } = 8 } \end{array} \right.

请输入您的数学问题…… \left\{ \begin{array} { c } { \sqrt { x } + \sqrt { y } = 6 } \\ { \sqrt { x y } = 8 } \end{array} \right.

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