(2x-y)(3x-2y)+(y-x)(2x-1)

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(2x-y)(3x-2y)+(y-x)(2x-1)
(2x-y)(3x-2y)+(y-x)(2x-1)

(2x-y)(3x-2y)+(y-x)(2x-1)
(2x-y)(3x-2y)+(y-x)(2x-1)
=6x²-4xy-3xy+2y²+2xy-y-2x²+x
=4x²-5xy+2y²+x-y;
很高兴为您解答,skyhunter002为您答疑解惑
如果本题有什么不明白可以追问,

楼主，你好：
原式=（6x²+2y²-7xy）+（2xy-2x²+x-y）
=4x²+2y²-5xy+x-y

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