x+3y-z=13,3x-2y-z=2,2x-y+z=-3
1个回答
X=负28
Y=负9
Z=负68
相关问题
1.x+y+z=21,x-y=1,2x+z-y=13.2.3x+2y+z=13,x+y+2z=7 ,2z+3y-z=12
{3x+2y+z=13 x+y+2z=7 2x+3y-z=12,求x,y,z
{3x+2y+z=13 {x+y+z=7 {2x+3y-z=12
证明:(y+z-2x)3+(z+x-2y)3+(x+y-2z)3=3(y+z-2x)(z+x-2y)(x+y-2z).
解方程组{2X-Y+Z=-3①,X+3Y-2Z=13②,3X-2Y-Z=2③
{2x+y=3,3x-y+z=8,x+2y+z=13
{2x+3y+2z=19{3x+2y+2z=17{2x+2y+3z=13
-x+2y+3z=12 2x-2y+5z=13 3x+2y+z=10
3x+y-2z=1,4x+2y-3z=1,2x-3y+4z=13
x^2(y+z)+y^2(z+x)+z^2(x+y)-(x^3+y^3+z^3)-2xyz