What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
Rotate a Matrix by 90 degrees
Derivative of polynomial
Convert given decimal number to binary number.
Rotate Matrix @180 degree
Add two different item as shown in example
Create an anti-identity matrix
Find out sum of prime number till given number
MATLAB Basic: rounding IV
Union of two set decreasing order
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