# Write the e

Given equation of the parabola is x2 - 4x - 8y + 12 = 0

x2 - 4x + 12 = 8y

x2 - 4x + 4 = 8y - 8

(x - 2)2 = 8(y - 1)

Comparing with the standard form of parabola (x - a)2 = 4b(y - c) we get,

4b = 8

b = 2

The equation of the directrix is y - c = - b

Directrix is y - 1 = - 2

Directrix is y = - 2 + 1

Directrix is y = - 1

The equation of the directrix is y = - 1.

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