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6x2-5xy-6y2+2x+23y-20.
人气:159 ℃ 时间:2019-12-13 06:42:50
解答
6x2-5xy-6y2+2x+23y-20
=6x2-x(5y-2)-(6y2-23y+20),
=6x2-x(5y-2)-(2y-5)(3y-4),
=(2x-3y+4)(3x+2y-5).
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