化简(2x-3y)(3x-2y+1)
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化简(2x-3y)(3x-2y+1)
![化简(2x-3y)(3x-2y+1)](/uploads/image/z/2273103-63-3.jpg?t=%E5%8C%96%E7%AE%80%EF%BC%882x%EF%BC%8D3y%EF%BC%89%EF%BC%883x%EF%BC%8D2y%2B1%EF%BC%89)
(2x-3y)(3x-2y+1)
原式=6x^2-4xy+2x-(9xy-6y^2+3y)
=6x^2-4xy+2x-9xy+6y^2-3y
=6x^2+6y^2-13xy+2x-3y
=6(x+y)^2-15xy+2x-3y
原式=6x^2-4xy+2x-(9xy-6y^2+3y)
=6x^2-4xy+2x-9xy+6y^2-3y
=6x^2+6y^2-13xy+2x-3y
=6(x+y)^2-15xy+2x-3y
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