How to write a quadratic function in vertex form and identify the vertex?

asked Apr 22, 2018 141k views

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suppose a quadratic function like

$f(x) = a {x}^(2) + bx + c$
the vertex will be

$x = ( - b)/(2a) \\ y = \frac{4ac - {b}^(2) }{4a}$

ThinkBig answered Apr 27, 2018

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