Quadratic Equation Solver
Solve any quadratic equation ax² + bx + c = 0 and see the discriminant and roots.
ax² + bx + c = 0
Discriminant: 1.00x = 2.0000 or x = 1.0000
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How to use quadratic equation solver
1Enter a, b and cThe coefficients from ax² + bx + c = 0.
2Read the rootsBoth solutions for x are shown, using the quadratic formula.
Questions people ask
If it's positive, there are two real roots; if zero, one repeated root; if negative, no real roots (only complex ones).
Then the equation isn't quadratic — it's linear, and this tool won't solve it.