Q = 4x2 + 4y2 + 7z2 + 6xy + 12yz + 4zx, | Q = 8x2 + 8y2 + 10z2 + 8xy + 4yz + 4zx, | |
Q = 2x2 + 3y2 + 2z2 + 14xy + 14yz + 16zx, | Q = 6x2 + 8y2 + 8z2 + 6xy + 10yz + 6zx, | |
Q = 8x2 + 4y2 + 8z2 + 20xy + 20yz + 12zx, | Q = 5x2 + 5y2 + 6z2 + 18xy + 16yz + 16zx, | |
Q = - x2 + 5y2 - z2 - 10xy + 10yz - 2zx, | Q = - 6x2 + y2 + z2 - 10xy - 4yz - 10zx, |