用T代替λA =[ 10-T,
0,
1, -5][
1,8-T, -3,
0][
3,
2, -8-T,
1][
1, -2,
2,7-T]det(A)=-4804+1078*T+12*T^2-17*T^3+T^4vpa(solve(-4804+1078*T+12*T^2-17*T^3+T^4))ans =8.2905211357678456649527236782657+1.7750526675868394146619718870297*i 8.2905211357678456649527236782657-1.7750526675...
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