What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
Back to basics 5 - Clipboard
Is A the inverse of B?
Sum of series I
Kelvin to Celsius
Find the rank of a matrix
Generate vector according to sign of vector
Solve Linear equations
Determine the mean of matrix
Find out rooms, peak to peak, average for a square wave.
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