Interactive worksheet - Vertex of parabola

Helping material for lesson: Quadratic function
Vertex of parabola: [math]V\left(\frac{-b}{2a},\frac{-\Delta}{4a}\right),[/math]
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– Beatrice Tiron, Math Teachers' Adventure of ICT Integration, Voinea-Axinte Costica

Information: Interactive worksheet - Vertex of parabola