化简求值：【4（xy-1）²-(xy+2)(2-xy)】÷¼xy,其中x=-3,y=1/5

化简求值：【4（xy-1）²-(xy+2)(2-xy)】÷¼xy,其中x=-3,y=1/5
化简求值：【4（xy-1）²-(xy+2)(2-xy)】÷¼xy,其中x=-3,y=1/5

化简求值：【4（xy-1）²-(xy+2)(2-xy)】÷¼xy,其中x=-3,y=1/5

[4(xy-1)²-(xy+2)(2-xy)]÷¼xy
=[4(x²y²-2xy+1)-(4-x²y²)]÷¼xy
=[4x²y²-8xy+4-4+x²y²]÷¼xy
=[5x²y²-8xy]÷¼xy
=20xy-32...

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[4(xy-1)²-(xy+2)(2-xy)]÷¼xy
=[4(x²y²-2xy+1)-(4-x²y²)]÷¼xy
=[4x²y²-8xy+4-4+x²y²]÷¼xy
=[5x²y²-8xy]÷¼xy
=20xy-32

将x=-3，y=1/5代入，得到：原式=-12-32=-44

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