2x^2-5x+2y^2-5y-5xy-25 因式分解

因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] x^2-xy-2y^2-x+5y-2 -x^5y-xy+2x^3y 2X^+XY-Y^-4X+5Y-6 2x^+xy-y^-4x+5y-6=? 已知x+y=-1,xy=-2,求代数式-5（x+y)+(x-y)+x(xy+y)的值 x²-y²+5x+3y+4（x+y-2xy)(x+y-z)+(xy-1）² 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) ((xy+2)(xy-2)-2x²y²+5(xy-y)²)÷(2xy) 已知X-XY-2Y=0求2X+3XY-Y/X-2XY+5Y 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 已知xy=2(x+y),求(5x-xy+5y)/(3xy-x-y)的值 已知xy=2(x+y),求5x-xy+5y/3xy-x-y的值 已知x-y=3xy,求5x+2xy-5y/x-4xy-y的值 已知Y-x=3xy,求(5x+3xy-5y)÷(x-2xy-y)