What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
Omit columns averages from a matrix
Determine the number of odd integers in a vector
find out eigenvector of matrix
Cumulative product of a vector
Convert Kilometers to Miles
calculate interest saved because of reduction of interest rate
Check transmitted data follow even parity (True or false)
Create vector as shown in test cases
Find the mode of the given input
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