find the directrix of the parabola x^2 - 4x - 8y + 12 = 0

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Kalidasan Rengaraj

x^2 - 4x - 8y+ 12 = 0 x^2 - 4x + 4 = 8y -8 (x -2)^2 = 8(y-1) therefore equation of directtrix is y - 1 + 2 = 0 i.e. y + 1 = 0
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Mathematics is not about numbers, equation, computation, or algorithms it is about UNDERISTANDING.

y=0
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Maths and physics teacher till engineering level

y=-1
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