\left\{ \begin{array} { l } { x y ( x + y ) = 4 } \\ { x y = 16 } \end{array} \right.
Solve for x, y (complex solution)
x=\frac{1+\sqrt{1023}i}{8}\approx 0.125+3.998046398i\text{, }y=\frac{-\sqrt{1023}i+1}{8}\approx 0.125-3.998046398i
x=\frac{-\sqrt{1023}i+1}{8}\approx 0.125-3.998046398i\text{, }y=\frac{1+\sqrt{1023}i}{8}\approx 0.125+3.998046398i
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