x^2-2xy+y^2+4x-4y+4快分解因式

因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 2x:y=4 xy成啥比例快 (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 (x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 x^2-2xy+y^2+4x-4y+4快分解因式 [(3x-2y)^2-(3x+2y^2]除以4xy计算,快 已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y² 快救救我~ 2x(x-y)+4xy(y-x) 因式分解2x(x-y)+4xy(y-x) 因式分解 (x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy) 已知(y+2x)/xy=3/2,求(4x+3xy+2y)/(-4x+8xy-2y)快.主要是过程. 已知xy=-2,x-y=3,求整式（-3xy-7y）+[4x-3(xy+y-2x)]的值快 急需 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 因式分解x^2(x-y)-4xy(x-y)-4y^2(y-x) 计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2 化简2(x²y+xy)-3(x²y-xy)-4x²y