(x-2y+z)(-x+2y+z)
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(x-2y+z)(-x+2y+z)
x+2y-z)(x+2y-z)
(x+2y-z)(x-2y+z)
x,y,z为正实数 x/(2x+y+z)+y/(x+2y+z)+z/(x+y+2z)
(x+y-z)(x-y+z)-(x+y+z)(x-y-z)
(x+y-z)*(x+y-z)-(x-y+z)*(x-y-z)等于多少
(x+y+z)(x-y+z)+(y-x+z)(y-x-z)求过程
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x-2z+y)(y+z-2x)+(x-z)(y-z)/(y+z-2x)(x-2y+z)
计算:(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z)/(y+z-2x)(x-2y+z)
计算:x^2/(x-y)(x-z)+y^2/(y-x)(y-z)+z^2/(z-x)(z-y)
已知x,y,z>0,xyz(x+y+z)=1,求证(x+y)(x+z)>=2
因式分解:z^2(x-y)-4(x-y)-3z(y-x)
分解因式 4a(x-y)²-a²(y-x)³ (x+y+z)(x-y+z)+(y-x+z) (y-x-z)(1)4a(x-y)²-a²(y-x)³ (2)(x+y+z)(x-y+z)+(y-x+z) (y-x-z)
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(xy-2z)(y+z-2x)+(x-z)(y-z)/(y+z-2x)(x-2y+z)速速回答
化简(x+Y)^2(y+z-x)(z+x-y)+(x-y)^2(x+y+z)(x+y-z)
计算题(x+y)^2(y+z-x)(z+x-y)+(x-y)^2(x+y+z)(x+y-z).
1、y-x/x²-y²2、(x-y)(y-z)(z-x)/(z-y)(y-x)(x-z)
{2x的平方-(x+y)(x-y)}{(z-x)(z+x)+(y+z)(y-z)}急!