Question 1170703
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Go to web-site


https://www.emathhelp.net/calculators/linear-algebra/eigenvalue-and-eigenvector-calculator/


and find a relevant online calculator there (free of charge).


Make a setup and input your 4x4-matrix there.



Press the button "Find eigenvalues and eigenvectors".



You will get the answer and the entire solution in seconds with the complete details and explanations.



It  DOES  NOT  yield to what you can get from other tutors or from other sources - - - it has

the same  (or even  BETTER)  educational value  (!)