Parabola Vertex Calculator
Enter a, b and c of the quadratic y = ax² + bx + c — you will get the vertex, axis, discriminant, roots (x-intercepts) and y-intercept with steps.
How to use
- Enter a (not 0), b and c.
- Vertex x is found from x = −b/(2a), then y is calculated.
Note: If a is positive, the parabola opens upward and the vertex is the minimum point; if a is negative, the vertex is the maximum. If the discriminant is negative, there are no x-intercepts (no real roots).