solve 求解 请高手指点

[Ashuren]

syms a
>> det(G)
ans =
158974276720000000000000000-1051845101400000000000000*a+454180680000000000000*a^2-28080000000000000*a^3
Solve(158974276720000000000000000-1051845101400000000000000*a+454180680000000000000*a^2-28080000000000000*a^3)

得出的结果不对啊！