(X^3-2y^3-3X^3y)-(3X^3-3y^3-7X^2y)怎么化简
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(X^3-2y^3-3X^3y)-(3X^3-3y^3-7X^2y)怎么化简(X^3-2y^3-3X^3y)-(3X^3-3y^3-7X^2y)怎么化简(X^3-2y^3-3X^3y)-(3X^3-3
(X^3-2y^3-3X^3y)-(3X^3-3y^3-7X^2y)怎么化简
(X^3-2y^3-3X^3y)-(3X^3-3y^3-7X^2y)怎么化简
(X^3-2y^3-3X^3y)-(3X^3-3y^3-7X^2y)怎么化简
(X^3-2y^3-3X^3y)-(3X^3-3y^3-7X^2y)
=X^3-2y^3-3X^3y-3X^3+3y^3+7X^2y
=-2X^3+y^2+4X^3y+7X^2y
(X^3-2y^3-3X^3y)-(3X^3-3y^3-7X^2y)
=x³-2y³-3x³y-3x³+3y³+7x²y
=-2x³+y³-3x³y+7x²y
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