化简x/2x²y
化简:(2x-y)²-4(x-y)(x+y)
化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
(2x-y)²-4(x-y)(x+2y)
化简:[(x+y)²-(x-y)²]÷2xy
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
因式分解2x-2y-x²+y² 化简x²-y²/x²y+xy²
化简(x²y-4y²)/(x²+4xy+4y²)*[(4xy)/(x-2y)+x
化简:(x²+y²/x-y)-(2xy/x-y)
化简:{2/3x-2/(x+y)[(x+y)/3x-x-y]}/【(x-y)/x】的负二次方
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x-2z+y)(y+z-2x)+(x
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)