Shortcut: Vertex formula
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Examples
Lessons
- Applying the "vertex formula" to find the vertex
Find the vertex for the quadratic function y=2x2−12x+10 - Converting general form into vertex form by applying the vertex formula
Convert each quadratic function from general form to vertex form by using the vertex formula. - Deriving the Vertex Formula
Derive the vertex formula by completing the square: y=ax2+bx+c : : (y+4a(b2−4ac))=a(x+2ab) ∴ vertex: [2a−b,4a−(b2−4ac)]
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