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numpy.polynomial.polynomial.Polynomial.roots
method
Polynomial.roots()[source]- 
    
Return the roots of the series polynomial.
Compute the roots for the series. Note that the accuracy of the roots decrease the further outside the domain they lie.
Returns: - 
           
roots : ndarray - 
           
Array containing the roots of the series.
 
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 https://docs.scipy.org/doc/numpy-1.16.1/reference/generated/numpy.polynomial.polynomial.Polynomial.roots.html