问题 解答题

6x2-5xy-6y2+2x+23y-20.

答案

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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