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Find the equation of the parabola whose ...

Find the equation of the parabola whose focus is `(1,-1)` and whose vertex is `(2,1)`. Also find the axis and latusrectum.

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The correct Answer is:
`4x^(2)-4xy+y^(2)+8x+46y-71=0`
Eq. of axis2x-y=0, length of L.R`=4sqrt5`
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