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AlgebraQuadratic Equations
Completing the Square
Convert ax² + bx + c into vertex form step by step.
Controls
1
6
5
Live result
Vertex form
1(x − -3)² + -4
Vertex
(-3, -4)
Minimum / maximum value
-4
Parabola y = ax² + bx + cVertex form: 1(x − -3)² + -4
y
Completing the square shows the vertex directly and derives the quadratic formula.