2xy-x2+1-y2因式分解

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2xy-x2+1-y2因式分解2xy-x2+1-y2因式分解2xy-x2+1-y2因式分解2xy-x2+1-y2=1-(x²-2xy+y²)=1-(x-y)²=(1+x-

2xy-x2+1-y2因式分解
2xy-x2+1-y2因式分解

2xy-x2+1-y2因式分解
2xy-x2+1-y2
=1-(x²-2xy+y²)
=1-(x-y)²
=(1+x-y)(1-x+y)

答案为：1－x∧2＋2xy－y∧2

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