规定运算&:使得 X&Y = X*X -(Y*Y)/(X*X) + Y*Y
(-1/2)&(-1/3)
= (-1/2)*(-1/2) - (-1/3)*(-1/3)/[(-1/2)*(-1/2)] + (-1/3)*(-1/3)
= 1/4 - 4/9 + 1/9
= 1/4 - 1/3
= -1/12
规定运算&:使得 X&Y = X*X -(Y*Y)/(X*X) + Y*Y
(-1/2)&(-1/3)
= (-1/2)*(-1/2) - (-1/3)*(-1/3)/[(-1/2)*(-1/2)] + (-1/3)*(-1/3)
= ¼ - 4/9 + 1/9
= ¼ - 1/3
= -1/12