[(2x+y)²-y(y+4x)-8x】/4x,其中x=-1,y=2005 急

2x-y=2,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y 因式分解2x(x-y)^4 - x²(x-y)² + xy(y-x)²RT x²-4y² x+2y---------- ÷ --------分数线x²+2xy+y² x²+xyx²-4y² x+2y----------÷--------分数线x²+2xy+y² x²+xy(x+2y)(x-2y)x(x+y)=----------------(x+y)(x+y)(x+2y)(x-y)x=------(x+y)这样对了吗? x²-4y²+x-2y因式分解 x²-4y²+x+2y因式分解 (x²-4y²)-(x+2y)怎样因式分解? 4x²-y²+2x-y 因式分解 x²-4y²-x-2y 分解因式 x²-x-4y²+2y 计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy x²-4y²/x²+2xy+y²÷x+2y/2x²+2xy 计算：4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]急 （3x-2y)²(3x-2y)²(9x²+4y²）² 化简再求值[(x²+y²）²-4x²y²]÷(x²-y²）其实,x=2,y=2/3. [(x-y)²+(x+y)(x-y)]除以2x 因式分解：(2x+3y)²-4y² （x+y)²-4(x+y-1) 已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y 就是已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y /4y就是除以4y