-2分之1(4xy-8x²)+3分之1(xy-6x²y²)化简.
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-2分之1(4xy-8x²)+3分之1(xy-6x²y²)化简.-2分之1(4xy-8x²)+3分之1(xy-6x²y²)化简.-2分之1(
-2分之1(4xy-8x²)+3分之1(xy-6x²y²)化简.
-2分之1(4xy-8x²)+3分之1(xy-6x²y²)化简.
-2分之1(4xy-8x²)+3分之1(xy-6x²y²)化简.
-2分之1(4xy-8x²)+3分之1(xy-6x²y²)
=-2xy+4x²+1/3xy-2x²y²
=-5/3xy+8x²-2x²y²)