(2X²-XY)-(X²-Y)怎么化简?
化简求值:x-y/x²-2xy+y²-xy+y²/x²-y²,其中(x
化简求值3x²y-[2xy-2(xy-3/2x²y)+xy]+3xy²其中x=3、y=-1
化简求值(xy-x²)/xy分之x²-2xy+y²乘x²分之x-y,其中y=二分
化简求值[1-(2x/x+y)]÷ (x²-2xy+y²/3x+3y)+(x²+xy/x&
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
2x+2y/x-y与(x+y)²/xy 怎么通分
化简求值3x²y-[2xy²-2(xy-3/2x²y)+xy]+3xy² ,当x
化简并求值 xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y},其中x=1,
1.化简求值:(x+y)(x-y)-(x-y)²-6x²y÷2y+(2xy)²÷(-4xy
化简求值(x+y)(x-y)-(x-y)²-6x²y/2y+(2xy)²/(-4xy)其中
化简求值(x+y)(x-y)-(x-y)²-6x²y除2y+(2xy)²除(-4xy)其中
x²/xy-x/y