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:[(xy-2)²+4xy-4]÷(xy),其中x=10,y=1/25
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
先化简,再求值 ⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1
化简并求值 xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y},其中x=1,
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3x²y-[2xy-2(xy-3/2x²y)+xy]+3xy²其中x=3、y=-1
(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 已知:(x+2)2;+|y+1|=0求5xy²-{2xy²-[3xy²(4xy&
化简求值[(xy+2)(xy+2)-2(xy+1)+2]÷(xy),其中x=10,y=-25分之1
先化简,再求值:[4(xy-1)^2-(xy+2)(2-xy)]÷(1/4xy),其中x=-2 y=1/4
先化简,再求值:{(xy-2)^2+4xy-4}/(-xy),其中x=10.,y=-1/25