What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
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Inner product of two vectors
Angle between two vectors
Matlab Basics II - Create a vector with a repeated entry
Check that number is whole number
Find Excess 3 code of given decimal number.
Find out sum of all elements of given Matrix
Number of Flip Flop required in ripple counter
Convert to Binary Coded Decimal
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