x^2+2xy-8y^2-4x-10y+3因式分解

化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 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 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) (x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy) 计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) 因式分解:8(x-2y)-x(7x+y)+xy. （x^2+xy/x-y)/（xy/x-y)计算 2x(x-y)+4xy(y-x) 因式分解2x(x-y)+4xy(y-x) 因式分解 已知2x+xy=10,3y+2xy=6.求4x+8xy+9y=? (x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy) 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 计算：（1）8x^2y^2*(-3x/4y^5) (2)(x+y)^2/xy-y^2*(y-x)^2/xy+y^2