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24 February, 22:28

What is the focus of the parabola given by the equation y = x2 - 2x - 3?

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  1. 24 February, 22:30
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    What is the focus of the parabola given by the equation y = x2 - 2x - 3?

    y = x2 - 2x - 3

    y = x2 - 2x - 3 - 1 + 1y = (x - 1) ^2 - 4 h = 1 and k = - 4 and a = 1

    Vertex (a, k) so it is (1,-4)

    Now focus is

    (1, - 4 + 1/4) = (1,-3 3/4)

    or

    (1,-3.75)
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