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(2x-1)^2-6(2x-1)+9 x^3y^3-2x^2y^2+xy
(2x-1)^2-6(2x-1)+9
x^3y^3-2x^2y^2+xy
人气:213 ℃ 时间:2020-02-06 01:43:27
解答
(2x-1)^2-6(2x-1)+9
=(2x-1-3)^2
=(2x-4)^2
=4(x-2)^2
x^3y^3-2x^2y^2+xy
=xy(x^2y^2-2xy+1)
=xy(xy-1)^2
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