What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
Remove the vowels
pressure to dB?
02 - Vector Variables 3
Area of an Isoceles Triangle
Determine the mean of matrix
Find the rank of a matrix
Find out rooms, peak to peak, average for a square wave.
Generate vector according to sign of vector
Solve Linear equations
Convert to Binary Coded Decimal
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