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Which equation has a graph that is a parabola with a vertex at (-2,0)

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  1. 17 December, 00:16
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    The equation of a parabola with a vertex at (h, k) is

    f (x) = a (x-h) + k

    where a is a constant not equal to zero.

    So for (h, k) = (-2,0), the general equation is

    y=f (x) = a (x--2) ^2+0,

    y=a (x+2) ^2, or

    If a=1 and expand,

    y=x^2+4x+4
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