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Show that product of the perpendicular d...

Show that product of the perpendicular distances from origin to pair of lines represented by `ax^(2)+2hxy+by^(2)+2gx+2fy+c=0` is `(|c|)/(sqrt((a-b)^(2)+4h^(2)))`

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The correct Answer is:
`(|c|)/(sqrt((a-b)^(2)+4h^(2)))`
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