syms x;
AS = sym(A);
polyA = charpoly(AS,x);
solve(polyA);

93.988842796147505104718718233034
  63.318989852350135397493503048259
  38.392863684000190231816927188875
  57.023973670819117411135094232301
  20.964197497113106525263127789941
  52.100859003607712279511955297751
  14.457776205660758291480361189262
  72.543368263184623095490492872815
 -19.500133944896490949432003697463
  65.733078713316290701540791543043
  71.723898977718034735792925663278
  57.262150118578505531059649955477
  27.620774843148443240592651344762
  49.356126883789838887152595264487
  51.847578071455088288616446818711
  70.832873937409296415793129090208
  12.524474726415933018910355256388
  37.721878707889458815773572522044
 -39.123034260347914003761194641743
  82.618237465274092122200710770248
  12.591224787366274858850190258322

double(subs(polyA,37.721878707889458815773572522044))