Odredite sva realna rješenja sustava jednadžbi x2−y2=2(xz+yz+x+y),x^2 - y^2 = 2(xz + yz + x + y),x2−y2=2(xz+yz+x+y), y2−z2=2(yx+zx+y+z),y^2 - z^2 = 2(yx + zx + y + z),y2−z2=2(yx+zx+y+z), z2−x2=2(zy+xy+z+x).z^2 - x^2 = 2(zy + xy + z + x).z2−x2=2(zy+xy+z+x).