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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 (52kb) downloaded 63 time(s).
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