What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
Back and Forth Rows
Generate vector according to sign of vector
Find out sum of all elements of given Matrix
Remove the positive integers.
Matlab Basics II - Create a vector with a repeated entry
MATLAB Basic: rounding II
Convert Decimal Number to Hex number (including non integer value)
Delete 2nd and 5th column of Given 6*6 matrix
Find out Harmonic mean.
MATLAB Basic: rounding
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