Free Calculator Tool

Quadratic Formula Calculator

Solve any quadratic equation ax² + bx + c = 0. Get both roots with step-by-step solution.

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Solve ax² + bx + c = 0

How It Works

The Quadratic Formula

For any equation ax² + bx + c = 0, the solutions are x = (-b ± √(b²-4ac)) / 2a. This formula works for all quadratic equations, whether they have real or complex roots.

The Discriminant

The discriminant (b²-4ac) determines the nature of roots: positive means two distinct real roots, zero means one repeated root, negative means two complex conjugate roots.

Step-by-Step Process

1) Identify a, b, c coefficients. 2) Compute the discriminant. 3) Take the square root. 4) Apply the formula for both + and - cases. 5) Simplify.

When to Use It

Use the quadratic formula when factoring is hard or impossible. It always works, unlike factoring which only works for "nice" numbers. It's essential for algebra, physics, and engineering.

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