若(x+y)(x+y-1)=6,求x+y的值

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若(x+y)(x+y-1)=6,求x+y的值
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若(x+y)(x+y-1)=6,求x+y的值
若(x+y)(x+y-1)=6,求x+y的值

 


若(x+y)(x+y-1)=6,求x+y的值