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

题目

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

答案

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