作业帮（2x-y)(3x-y)+(y-x)(2x-5y)
来源：学生作业帮助网 编辑：作业帮 时间：2024/08/01 02:03:48
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（2x-y)(3x-y)+(y-x)(2x-5y)
（2x-y)(3x-y)+(y-x)(2x-5y)
（2x-y)(3x-y)+(y-x)(2x-5y)
（2x-y)(3x-y)+(y-x)(2x-5y)
=（2x-y)(3x-y)-(x-y)(2x-5y)
=2x^2-5xy+y^2-(2x^2-7xy+5y^2)
=2x^2-5xy+y^2-2x^2+7xy-5y^2
=-5xy+y^2+7xy-5y^2
=2xy-4y^2
=2y(x-2y)
4x²-3y²
x(x-y)2-(y-x)3
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
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化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
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化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
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