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9 June, 01:54

From the equation of a parabola identify the focus and directrix:

y^2 + 12x - 6y + 21 = 0

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  1. 9 June, 02:09
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    Y² + 12x - 6y + 21 = 0

    - 21 - 21

    y² + 12x - 6y = - 21

    12x + y² - 6y = - 21

    12x + (y² - 6y + 9) = - 21 + 9

    12x + (y - 3) ² = - 12

    -12 - 12 - 12

    -x + (y - 3) ² = 1

    -12
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