-2分之1（4xy-8x²）+3分之1（xy-6x²y²）化简.刚刚那题谢谢你了.

-2分之1（4xy-8x²）+3分之1（xy-6x²y²）化简.刚刚那题谢谢你了.
-2分之1（4xy-8x²）+3分之1（xy-6x²y²）化简.刚刚那题谢谢你了.

-2分之1（4xy-8x²）+3分之1（xy-6x²y²）化简.刚刚那题谢谢你了.

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

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