The equation of the directrices of the h...

The equation of the directrices of the hyperbola `3x^(2) - 3y^(2) - 18x + 12y + 2 = 0` is

`x = 3 pm sqrt((13)/(6))`

`x = 3 pm sqrt((6)/(13))`

`x = 6 pm sqrt((13)/(3))`

`x = 6 pm sqrt((3)/(13))`

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