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数学
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6x^2-7xy-3y^2+13x+8y-5
用双十字相乘法
人气：106 ℃ 时间：2020-05-13 15:52:29
解答
6x^2-7xy-3y^2+13x+8y-5
=(2x-3y)(3x+y)+13x+8y-5
=(2x-3y+5)(3x+y-1)
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