化简:(1)(xy−y
化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2
化简xy-1-x+y
分解因式:(X+Y)*(X+Y+2XY)+(XY+1)*(XY-1)
xy(xy+1)+(xy+3)-2(x+y+2分之一)-(x+y-1)的平方
已知1x-1y=10,则3y−6xy−3xy+2xy−x的值是( )
因式分解(xy-x)+(1-y)
xy-1+x-y
分解因式:xy(xy+1)+(xy+3)−2(x+y+12)−(x+y−1)
化简、求值(1)化简:3(x-2y)+2(3x+y)(2)先化简再求值(3x²y-2xy²)-(xy
若xy=x-y≠0,则分式1y−1x=( )
3(x的2次方y+xy)-4(xy-2x的2次方y)-(-xy)化简
因式分解:(x+y)(x+y+2xy)+(xy+1)(xy-1)=______.