If the equation `ax^(2)+hxy+by^(2)+4gx+6fy+4c=0` represents a pair of lines thenA. `4abc+4fgh=4.5af^(2)+4bg^(2)+h^(2)`B. `4abc+6fgh-9af^(2)+4bg^(2)+ch^(2)`C. `4abc+2fgh-9af^(2)+2bg^(2)+h^(2)`D. `4abc+12fgh-9af^(2)+4bg^(2)+2h^(2)`

If the equation `ax^(2)+hxy+by^(2)+4gx+6fy+4c=0` represents a pair of

1.	If the equation `ax^(2)+hxy+by^(2)+4gx+6fy+4c=0` represents a pair of lines thenA. `4abc+4fgh=4.5af^(2)+4bg^(2)+h^(2)`B. `4abc+6fgh-9af^(2)+4bg^(2)+ch^(2)`C. `4abc+2fgh-9af^(2)+2bg^(2)+h^(2)`D. `4abc+12fgh-9af^(2)+4bg^(2)+2h^(2)`
Answer» Correct Answer - B

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