2x^2+xy-3y^2-x-4y-1因式分解`在线等过程阿``这才是重点`
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2x^2+xy-3y^2-x-4y-1因式分解`在线等过程阿``这才是重点`
2x^2+xy-3y^2-x-4y-1因式分解`在线等
过程阿``这才是重点`
2x^2+xy-3y^2-x-4y-1因式分解`在线等过程阿``这才是重点`
(x-y-1)(2x+3y+1)
2x^2+xy-3y^2-x-4y-1=?没有等于多少怎么分。
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若x-y=4,xy=1,求(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
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