化简求值3x²y-[2xy²-2(xy-3/2x²y)+xy]+3xy² ,当x
化简求值3x²y-[2xy²-2(xy-3/2x²y)+xy]+3xy² ,当x
化简求值3x²y-[2xy-2(xy-3/2x²y)+xy]+3xy²其中x=3、y=-1
化简并求值 xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y},其中x=1,
先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y
化简求值:(-1/3XY)²[xy(2x-y)-2x(xy-y²)],其中X=-3/2,Y=-2
化简求值 已知:(x+2)2;+|y+1|=0求5xy²-{2xy²-[3xy²(4xy&
化简求值:【4(xy-1)²-(xy+2)(2-xy)】÷¼xy,其中x=-3,y=1/5
化简求值[1-(2x/x+y)]÷ (x²-2xy+y²/3x+3y)+(x²+xy/x&
化简求值:x-y/x²-2xy+y²-xy+y²/x²-y²,其中(x
先化简,再求值 4(xy²+3xy-2x²y)-[12xy-3(3x²y-2xy²
先化简再求值:2x²+(-x²+3xy+2y²)-(-x²-xy+2y²
先化简再求值,3xy²(xy+2y²-x²)+3x³y²,其中x=2,