What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
Which values occur exactly three times?
Return elements unique to either input
Test if two numbers have the same digits
Largest Prime Number
Find the product of a Vector
find out eigenvector of matrix
Create an anti-identity matrix
Flip the vector from right to left
Create Vector containing following elements
Find out value of sine given by degree.
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