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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

A

`x=3pmsqrt((13)/(6))`

B

`x=3pmsqrt((6)/(13))`

C

`x=6pmsqrt((13)/(3))`

D

`x=6pmsqrt((3)/(13))`

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