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Finding the vertex of a parabola in standard form - Khan Academy You can arrive at this 'formula' by converting standard form into vertex form But the x-coordinate of the vertex is the one I think you should remember, as you can then use that to plug in and get the y-coordinate
Quadratic functions equations: FAQ (article) | Khan Academy What is vertex form? Vertex form is another way of writing a quadratic equation It looks like this: f (x) = a (x h) 2 + k , where a , h , and k are constants The vertex form is particularly useful for graphing quadratics because the vertex of the parabola is located at the point (h, k) Practice with our Graph quadratics in vertex form exercise
Vertex axis of symmetry of a parabola (video) | Khan Academy Sal rewrites a quadratic equation in vertex form and shows how it reveals the vertex of the corresponding parabola Created by Sal Khan and Monterey Institute for Technology and Education