2X^+XY-Y^-4X+5Y-6
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
因式分解 求过程 x-xy+3y-3x 2x+xy-y-4x+5y-6
x*-2xy+3y*=9 4x*-5xy+6y*=30
x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值
[-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y-
已知x^2+y^2-4x+6y+13=0求(xy+y^2/5x^2-5xy+xy+y^2)·(5/x+y)-(y/x-y
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
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*
已知x>0,y>0,x+根号xy-6y=0,求4x+5根号xy-6y分之x+2根号xy
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)
已知X+Y=2XY,求4X-5XY+4Y 除以X+XY+Y 的值