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The equation of the conic with focus at ...

The equation of the conic with focus at `(1,-1),` directrix along `x -y + 1=0` and with eccentricity `sqrt2,` is

A

` x^(2) - y^(2) = 1`

B

`xy = 1`

C

`2xy - 4x + 4y + 1 = 0`

D

`2xy + 4x - 4y - 1 = 0`

Text Solution

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The correct Answer is:
C
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