若2x+3y=1004,则多项式2(3x-2y)-(x-y)+(-x+9y)=?
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
若x+y=4,则多项式½(x+y)+4﹙x-y)-3(x-y)-3/2(x+y)-x+y是多少?
若2x+3y=2004,则代数式2(3x-2y)-(x-y)+(-x+9y)=...
若2x+y=2012,则代数式2(3x-2y)-(x-y)+(-x+9y)=
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若全集I={(x,y)|x,y∈R},集合M={(x,y)|(y-3)/(x-2)},N{(x,y)|y=x=1},则(
若将x-y看成一个整体,合并多项式(x-y)2+3(x-y)-2(y-x),可得多少
若将x-y看成一个整体,合并多项式(x-y)+3(x-y)-2(y-x),可得-------
若将X-Y看成一个整数,合并多项式(X-Y)²+3(X-Y)-2(Y-X),可得?
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=