因式分解:(x+y+z)^5-x^5-y^5-z^5
因式分解:25x y^2 z^2 (x+y-z)-30xyz(z-x-y)^2+5x y z^3 (z-x-y)
(x+y+z)^5-(x+y-z)^5-(x+z-y)^5-(z+y-x)^5,
因式分解:(x+y+z)^5-x^5-y^5-z^5
因式分解(3X+4Y-5Z)(3X-4Y=5Z)
x/2=y/3=z/5 x+3y-z/x-3y+z
1.(x+y-z)+(x-y+z)-(x-y-z) 2.2x-(3x-2y+3)-(5y-2)
{x+y+z=1;x+3y+7z=-1;z+5y+8z=-2
一道数奥题,(x+y-z)²+(y+z-4)=-|z+x-5|
已知3X=4X,5Y=6Z求X+Y:Y+Z
因式分解(Y+Z)(X+Z)+(X+Y)+XYZ
因式分解:(y+z)(x+z)(x+y)+xyz
(X-Y)3+(Y-Z)3+(Z-X)3 因式分解