(x+2y)²-2（x-y)(x-y)+2y(x-3y)帮忙化简下,准确一点哦,

[(x-y)²+(x+y)(x-y)]除以2x 因式分解2x(x-y)^4 - x²(x-y)² + xy(y-x)²RT （x+y）²-2(x²-y²)+（y-x）² 分解公因式 （x+y）²-2（x²-y²）+（x-y）² 计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy 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? 2x-y=2,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y 若x²+xy-2y²=0,则x²+3xy+y²/x²+y² x²+xy-2y²=0则x²+3xy+y²/x²+y² 因式分解：（x-2y)²-（2x+y）² 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? 因式分解 x²-XY-2y²-X-Y 4x²-y²+2x-y 因式分解 x²;+2x-8+6y-y² 因式分解 x²+xy-2y²-x+7y-6 因式分解m²+2m(x+y)+(x+y)²