1.x^2-9y^2/2x-6y 2.2x+6/x^+3x 3.x-2/x^2-4x+4 4.24xy^2z^3/4z^
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1.x^2-9y^2/2x-6y 2.2x+6/x^+3x 3.x-2/x^2-4x+4 4.24xy^2z^3/4z^2y 5.-3xy·x/3y
1.x^2-9y^2/2x-6y 2.2x+6/x^+3x 3.x-2/x^2-4x+4 4.24xy^2z^3/4z^
1.x+y=16,y+z=12,z+x=102.3x-y+z=4,2x+3y-z=12,x+y+z=63.x+y+z=6
1.(x+y-z)+(x-y+z)-(x-y-z) 2.2x-(3x-2y+3)-(5y-2)
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(xy-2z)(y+z-2x)+(x-
解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y
已知实数x,y,z满足x²-6xy+10y²+4y+|z²-3z+2|+4=0,求(x+y
(x+2y-7z)^3+(3x-4y+6z)^3-(4x-2y-z)^3 因式分解
x+y+z=4 2x+3y-z=6 3x+2y+2z=10
2x-y+2z=-17 3x+y-3z=-4 x+y+z=6
2x+5y+4z=6,3x+y-7z=-4,x+y-z=?
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
{2x+3y-4z=-5 x+y+z=6 x-y+3z=10