About the Quadratic Equation Solver
Solve ax² + bx + c = 0 and see the roots and discriminant. This tool is free, works in your browser and needs no sign-up.
How to use the Quadratic Equation Solver
Enter the values of a, b and c. If the discriminant is negative the roots are complex.
Formula used
x = (−b ± √(b² − 4ac)) ÷ 2a.
Example
x² − 5x + 6 = 0 has the roots x = 2 and x = 3.
Frequently asked questions
Is the Quadratic Equation Solver free to use?
Yes. It is completely free and you can use it as many times as you like.
How accurate is the Quadratic Equation Solver?
The calculator uses standard formulas, so the maths is exact. Real life results can differ because of fees, taxes, rounding or personal factors, so treat the answer as an estimate.
Do you store the numbers I enter?
No. All calculations run in your browser. The values you type are not sent to our server.
Disclaimer: results are estimates for information only. They are not financial, medical or professional advice.