A.fff\(\sqrt3(a^2+b^2+c^2)\)/fff
B.fff\((\frac{\sqrt{3}}{2})(a^2-b^2-c^2)\)/fff
C.fff\((\frac{\sqrt{3}}{2})(a^2-b^2+c^2)\)/fff
D.fff\((\frac{\sqrt{3}}{2})(a^2+b^2-c^2)\)/fff
E.fff\((\frac{\sqrt{3}}{2})(a^2+b^2+c^2)\)/fff
我的答案: