计算(2X^2Y-2XY^2)-[(-3X^2Y^2+3X^2Y)+(3X^2Y^2-3XY^2)]X=-1 Y=2
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计算(2X^2Y-2XY^2)-[(-3X^2Y^2+3X^2Y)+(3X^2Y^2-3XY^2)]X=-1 Y=2
计算(2X^2Y-2XY^2)-[(-3X^2Y^2+3X^2Y)+(3X^2Y^2-3XY^2)]
X=-1 Y=2
计算(2X^2Y-2XY^2)-[(-3X^2Y^2+3X^2Y)+(3X^2Y^2-3XY^2)]X=-1 Y=2
解
(2X^2Y-2XY^2)-[(-3X^2Y^2+3X^2Y)+(3X^2Y^2-3XY^2)]
=(2x^2y-2xy^2)-(3x^2y-3xy^2)
=(2x^2y-3x^2y)+(-2xy^2+3xy^2)
=-x^2y+xy^2
=-xy(x-y)
=-2(-1-2)
=6