3xy-[2xy-2(xy-2分之3xy)+xy]+3xy,其中x=3,y=负3分之一大神们帮帮忙
先化简,再求值 ⒈2(Xy+Xy)-3(Xy-xy)-4Xy,其中X=1,y=-1
化简:xy分之3x^2+2xy-xy分之2x^2-xy=
当x=3,y=3分之1时,求代数出3xy-[2xy-2(xy-2分之3xy)+xy]+3xy的值
(x+2y-3xy+2x+y-xy)-(-2-y+xy),其中x+y=2分之1,xy=-2分之1
3xy-3xy-xy+2yx
[(2+xy)(xy-2)+(-xy-2)的平方]其中x=6,y=-3分之2
3xy²-[xy-2(xy-3/2x²y)+3xy²]+3xy²,其中x=3,y
xy(xy+1)+(xy+3)-2(x+y+2分之一)-(x+y-1)的平方
(-3x^y+2xy)-( )=4x^+xy
已知x+y分之xy=2,那么3x-5xy+3y分之3xy-x-y=
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
已知X+Y分之XY=2,求-X+3XY-Y分之3X+5XY+3Y