MichaelS
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 Mar 24 awarded Nice Question Aug 23 awarded Citizen Patrol Aug 21 awarded Autobiographer Nov 8 awarded Famous Question Sep 14 awarded Popular Question Sep 2 awarded Famous Question Jul 2 awarded Curious May 2 awarded Popular Question Sep 28 awarded Notable Question Apr 19 awarded Popular Question Feb 4 awarded Notable Question Aug 2 awarded Yearling Jul 30 comment What is the correct way to solve $|2K^3-2K^4|$ determinant? Of course.. Totally forgot about $I-K$. Thanks! Jul 30 revised What is the correct way to solve $|2K^3-2K^4|$ determinant? deleted 30 characters in body Jul 30 comment What is the correct way to solve $|2K^3-2K^4|$ determinant? Why couldn't we do the same trick without knowing how K is build? We know K is invertible ($det(K) \neq 0$) and we know that its size is $3\times 3$. Isn't it enough? Jul 30 revised What is the correct way to solve $|2K^3-2K^4|$ determinant? pointing out the mistake Jul 30 accepted What is the correct way to solve $|2K^3-2K^4|$ determinant? Jul 30 revised What is the correct way to solve $|2K^3-2K^4|$ determinant? Added the matrix K Jul 30 comment What is the correct way to solve $|2K^3-2K^4|$ determinant? @GerryMyerson: In which specific cases it does equal? Jul 30 asked What is the correct way to solve $|2K^3-2K^4|$ determinant?