(x+1)^2+|y-1|+|z|=0.
x=-1,y=1,z=0
A=2x^2-xyz,B=y^2-z^2+xyz,C=-x^2+2y^2-xyz
A=2,B=1,C=1
A-[(ZB-3(C-A)]
=A-[-3(C-A)]
=A+3(C-A)
=3C-2A
=3-4
=-1
(x+1)^2+|y-1|+|z|=0.
x=-1,y=1,z=0
A=2x^2-xyz,B=y^2-z^2+xyz,C=-x^2+2y^2-xyz
A=2,B=1,C=1
A-[(ZB-3(C-A)]
=A-[-3(C-A)]
=A+3(C-A)
=3C-2A
=3-4
=-1