Quadratic Equation Calculator
Enter the coefficients a, b and c to solve ax² + bx + c = 0 using the quadratic formula.
Solve for x in: a·x² + b·x + c = 0
Formula
x = (−b ± √(b² − 4ac)) ÷ 2a
Example
x² − 5x + 6 = 0 solves to x = 2 or x = 3.
Frequently Asked Questions
- What if there are no real roots?
- When the discriminant (b² − 4ac) is negative, the equation has no real solutions — only complex ones, which this calculator doesn't compute.
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