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# Python | Numpy np.polyroots() method

• 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 :

 `# Python program explaining``# numpy.polyroots() method ``   ` `# importing numpy as np  ``# and numpy.polynomial.polynomial module as geek ``import` `numpy as np ``import` `numpy.polynomial.polynomial as geek``   ` `# Input polynomial series coefficients`` ` `s ``=` `(``2``, ``4``, ``8``) ``    ` `# using np.polyroots() method ``res ``=` `geek.polyroots(s) `` ` `# Resulting polynomial series coefficient``print` `(res) `
Output:

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

```

Code #2 :

 `# Python program explaining``# numpy.polyroot() method ``   ` `# importing numpy as np  ``# and numpy.polynomial.polynomial module as geek ``import` `numpy as np ``import` `numpy.polynomial.polynomial as geek``   ` `# polynomial series coefficients``s ``=` `(``1``, ``2``, ``3``, ``4``, ``5``) `` ` `   ` `# using np.polyroots() method ``res ``=` `geek.polyroots(s) `` ` `# Resulting polynomial series``print` `(res) `
Output:
```[-0.53783227-0.35828469j -0.53783227+0.35828469j  0.13783227-0.67815439j
0.13783227+0.67815439j]

```

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