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4 November, 04:51

A parabola has a vertex at (-1, 0) and opens down. What is the equation of the parabola?

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  1. 4 November, 06:07
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    The vertex form: y = a (x - h) ² + k

    (h; k) the coordinates of vertex

    (-1; 0) ⇒ h = - 1 and k = 0

    therefore y = a (x + 1) ²

    A parabola opens down, therefore a < 0.

    Answer: y = a (x + 1) ² where a < 0.
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