已知xy=8满足x²-xy-x+y=56,求x²+y²的值
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已知xy=8满足x²-xy-x+y=56,求x²+y²的值
![已知xy=8满足x²-xy-x+y=56,求x²+y²的值](/uploads/image/z/18402587-35-7.jpg?t=%E5%B7%B2%E7%9F%A5xy%3D8%E6%BB%A1%E8%B6%B3x%26sup2%3B-xy-x%2By%3D56%2C%E6%B1%82x%26sup2%3B%2By%26sup2%3B%E7%9A%84%E5%80%BC)
无法求解(无实数解),请看下图.
![](http://img.wesiedu.com/upload/8/73/8739844ba22dfee233982f54e1d6e739.jpg)
![](http://img.wesiedu.com/upload/8/73/8739844ba22dfee233982f54e1d6e739.jpg)
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