Step by step
Rewrite a quadratic ax² + bx + c in vertex form a(x − h)² + k by completing the square, and read off the vertex.
Step by step
Enter the coefficients a, b and c.
Type a, b and c from ax² + bx + c. a cannot be 0.
The quadratic is rewritten as a(x − h)² + k.
The vertex of the parabola is the point (h, k).