作业帮(2x^2y-2xy^2)-[(-3x^2y^2+3x^2y)+(3x^2y^2-3xy^2)],其中x=-1,y=2 化简在求值!
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![(2x^2y-2xy^2)-[(-3x^2y^2+3x^2y)+(3x^2y^2-3xy^2)],其中x=-1,y=2 化简在求值!](/uploads/image/z/266647-31-7.jpg?t=%282x%5E2y-2xy%5E2%29-%5B%28-3x%5E2y%5E2%2B3x%5E2y%29%2B%283x%5E2y%5E2-3xy%5E2%29%5D%2C%E5%85%B6%E4%B8%ADx%3D-1%2Cy%3D2+%E5%8C%96%E7%AE%80%E5%9C%A8%E6%B1%82%E5%80%BC%21)
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(2x^2y-2xy^2)-[(-3x^2y^2+3x^2y)+(3x^2y^2-3xy^2)],其中x=-1,y=2 化简在求值!
(2x^2y-2xy^2)-[(-3x^2y^2+3x^2y)+(3x^2y^2-3xy^2)],其中x=-1,y=2 化简在求值!
(2x^2y-2xy^2)-[(-3x^2y^2+3x^2y)+(3x^2y^2-3xy^2)],其中x=-1,y=2 化简在求值!
(2x^2y-2xy^2)-[(-3x^2y^2+3x^2y)+(3x^2y^2-3xy^2)]
=2x^2y-2xy^2-(-3x^2y^2+3x^2y+3x^2y^2-3xy^2)
=2x^2y-2xy^2-(3x^2y-3xy^2)
=2x^2y-2xy^2-3x^2y+3xy^2
=-x^2y+xy^2
=-2-4
=-6
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