求(2X-2Y)(x-2y)=5 （2x+y)(x-2y)+7 xy=x+y 的整數(shù)解
求(2X-2Y)(x-2y)=5 （2x+y)(x-2y)+7 xy=x+y 的整數(shù)解
數(shù)學(xué)人氣：255 ℃時間：2020-07-30 19:40:35
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