What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
How to find the position of an element in a vector without using the find function
Calculate distance travelled when given radius and rotations
Skip by a multiple
Create a Matrix of Zeros
Convert decimal to hex as shown in test cases
Find out sum of prime number till given number
Solve Linear equations
Convert to Binary Coded Decimal
Convert number from given base to other base
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