大师作文网先化简 再求值:[4(xy-1)^2-(xy+2)(2-xy)]1/4xy,其中x=-2,y=1/2
![先化简 再求值:[4(xy-1)^2-(xy+2)(2-xy)]1/4xy,其中x=-2,y=1/2](/uploads/image/z/6993480-48-0.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80+%E5%86%8D%E6%B1%82%E5%80%BC%3A%5B4%28xy-1%29%5E2-%28xy%2B2%29%282-xy%29%5D1%2F4xy%2C%E5%85%B6%E4%B8%ADx%3D-2%2Cy%3D1%2F2)
先化简,再求值 ⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1
先化简,再求值：{（xy-2）^2+4xy-4}/(-xy),其中x=10.,y=-1/25
先化简,再求值：{（xy-2）^2+4xy-4}/(-xy),其中x=1.,y=-1/25
先化简 再求值:[4(xy-1)^2-(xy+2)(2-xy)]1/4xy,其中x=-2,y=1/2
先化简,再求值:[4(xy-1)^2-(xy+2)(2-xy)]÷(1/4xy),其中x=-2 y=1/4
（1）先化简,再求值:[4(xy-1)²-(xy+2)(2-xy)]÷1/4xy,其中x=-2,y=1/5.
化简求值：[（xy-2)²+4xy-4]÷(xy),其中x=10,y=1/25
化简并求值 xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y},其中x=1,
先化简再求值:2(xy^2-2y+1/2xy)-(xy+3xy^2-4y),其中x=4,y=1/2,
化简求值：[x(xy-1)^2-(xy+2)(2-xy)]除以4分之1xy,其中x=-2,y=5分之1.
化简求值:[4(xy-1)²-(xy+2)(2-xy)]÷ -1/4 xy,其中x=-2,y=1/5
化简求值：【4（xy-1）²-(xy+2)(2-xy)】÷¼xy,其中x=-3,y=1/5