Python | Numpy np.polyroots() method (original) (raw)

Last Updated : 31 Dec, 2019

**np.polyroots()** method is used to compute the roots of a polynomial series.Return the roots of the polynomial.

Syntax : np.polyroots(c)
Parameters:
**c :**[array_like] 1-D arrays of polynomial series coefficients.

Return : [ndarray] Array of the roots of the series. If all the roots are real, then out is also real, otherwise it is complex.

Code #1 :

import numpy as np

import numpy.polynomial.polynomial as geek

s = ( 2 , 4 , 8 )

res = geek.polyroots(s)

print (res)

Output:

[-0.25-0.4330127j -0.25+0.4330127j]

Code #2 :

import numpy as np

import numpy.polynomial.polynomial as geek

s = ( 1 , 2 , 3 , 4 , 5 )

res = geek.polyroots(s)

print (res)

Output:

[-0.53783227-0.35828469j -0.53783227+0.35828469j 0.13783227-0.67815439j 0.13783227+0.67815439j]

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