x^2+y^2-x^2y^2-4xy-1 分解因式
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x^2+y^2-x^2y^2-4xy-1 分解因式
x^2+y^2-x^2y^2-4xy-1 分解因式
x^2+y^2-x^2y^2-4xy-1 分解因式
x^2+y^2-x^2y^2-4xy-1
=(x^2+y^2-2xy)-(x^2y^2+2xy+1)
=(x-y)^2-(xy+1)^2
=(x-y+xy+1)(x-y-xy-1)
(x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1)
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
.(x+y-2)(x+y-2xy)+(xy-1)^2
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
x-y/x^2+xy除以xy-x^2/x^2y^2-x^4*1/x-y
计算:2xy/(x+y)².(x+y)/4y
化简:[4xy(x-y)^-1 + (xy^-1 - x^-1y)/(x^-1 + y^-1)] / (x+y)^2
x²-y²+5x+3y+4(x+y-2xy)(x+y-z)+(xy-1)²
(-x-y)(x^2+xy+y^2)
计算:(4xy(x-y)^-1+(x(y^-1)-(x^-1)y)/((x^-1)+(y^-1)))*(x+y)^-2
XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2)
化简x^-y^/x^-2xy+y^
2*(x-y)²(y-x)(xy)
1-2/x+y=xy,4y+6x=xy.求xy的解?
(x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy)
(x^2+xy/x-y)/(xy/x-y)计算
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
{(x-y/x^2-2xy+y^2)-(xy+y^2/x^2-y^2)}*(xy/y-1)