化简:3(x^2-2xy)-[3x^2-2y+2(xy+y)]

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化简:3(x^2-2xy)-[3x^2-2y+2(xy+y)]化简:3(x^2-2xy)-[3x^2-2y+2(xy+y)]化简:3(x^2-2xy)-[3x^2-2y+2(xy+y)]3(x^2-2

化简:3(x^2-2xy)-[3x^2-2y+2(xy+y)]
化简:3(x^2-2xy)-[3x^2-2y+2(xy+y)]

化简:3(x^2-2xy)-[3x^2-2y+2(xy+y)]
3(x^2-2xy)-[3x^2-2y+2(xy+y)]
=3x^2-6xy-3x^2+2y-2xy-2y
=-8xy