Polynomial Root Finder
One polynomial per line, coefficients from highest to lowest power separated by commas or spaces; 1 -3 2 means x²-3x+2=0. Methods: all roots / Newton / bisection
Root-finding method:
Formula:
Separator:
Calculation Result
Download CSV
| No. | Expression | Method | Root | Iterations | Steps |
|---|
Introduction to the tool and how to use it
Online polynomial root finder: enter one equation per line, coefficients separated high-to-low degree by commas or spaces; entering 1 -3 2 means x²-3x+2=0. Choose all roots (including complex roots shown as a+bi), Newton's method (give an initial x0 and see x / f(x) / f'(x) at each iteration), or bisection (give interval a, b and see the midpoint and interval width). Degree caps at 20, and linear equations return an analytic solution directly; when there is no root in the interval or convergence fails, it reports clearly and never outputs NaN.
How to use
- Paste polynomial coefficients per line from highest degree to lowest.
- Choose the root-finding method and enter the corresponding initial value or interval.
- Click Run.
- Copy or export the roots.
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