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xy(x²y²-1)-(x²y²-1)
=(x²y²-1)(xy-1)
=(x²y²-1)(xy-1)
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展开全部
x3y3-x2y2-xy+1
=x^2y^2(xy-1)-(xy-1)
=(x^2y^2-1)(xy-1)
=(xy+1)(xy-1)^2
=x^2y^2(xy-1)-(xy-1)
=(x^2y^2-1)(xy-1)
=(xy+1)(xy-1)^2
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展开全部
x3y3-x2y2-xy+1
= x^2y^2(xy - 1) - (xy - 1)
= (xy - 1)(x^2y^2 - 1)
= (xy - 1)^2(x y + 1)
= x^2y^2(xy - 1) - (xy - 1)
= (xy - 1)(x^2y^2 - 1)
= (xy - 1)^2(x y + 1)
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