Polynomial Roots Calculator

Find the roots (x-intercepts) of polynomial equations.

What this calculator does

For ax² + bx + c = 0: x = (−b ± √(b²−4ac)) / 2a.

How it works

Discriminant > 0: 2 real roots. = 0: 1 real root. < 0: 2 complex roots.

Frequently asked questions

How do I find roots of a quadratic?

Use the quadratic formula: x = (−b ± √(b²−4ac)) / 2a.