This work sheet will help construct the vector of coefficients
required by "polyroots". The "companion matrix" provides the
argument to dn_LinAlgEigenvalues(companion matrix).
You may need the "companion matrix" or "coeffs" for other math,
for instance spooling little piece of information, transmit to
community members for recovery at home.

Jean

Solve Companion, Polyroots.sm (51 KiB) downloaded 83 time(s).