【（x-2y)^2-4y^2+2xy】除以2x,其中,x=2,y=1.

化简x²-2xy 除xy-2y² 计算[4/(x^2-y^2)+(x+y)/(xy^2-x^2y)]除[(x+2y)(x-y)/(x^2+2xy^2)分式计算 {（2x-y)的平方+(2x+y)(2x-y）+4XY}除2x 计算[(2x-y)的平方+(2x+y)乘(2x-y)+4xy]除2x (y^2-x^2)/(5x^2-4xy)除于(x+y)/(5x-4y) 分式乘法-3xy除2y平方/3x 化简求值(x+y)(x-y)-(x-y)²-6x²y除2y+(2xy)²除(-4xy)其中x=-2,y=1/3 已知XY除于X加Y等于3,求2X-3XY+2Y的和除于-X+3XY-Y的值 (x+y)分之(x^2+2xy+y^2)乘 （x^2+y^2)除 (y-1)分之(x^4-y^4) (x+y)分之(x^2+2xy+y^2)乘 （x^2+y^2)除 (y-1)分之(x^4-y^4) [6xy-3(xy-2分之1x^2y]除3xy,其中x=2002,y=2003 [6xy^2乘(-2xy)^2-24x^5y^6除(-2xy)^2]除(-3xy^2)^2,其中x=2,y=2003 数学题高手来【（xy+2)(xy-2)-2x的平方y的平方+4】除（xy)写出过程 还有题也帮我解一下哈.【（xy+2)(xy-2)-2x的平方y的平方+4】除（xy) 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) (x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1) 计算:2xy/(x+y)².(x+y)/4y 2x²-3xy-5y²=0则x除y=