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If the equation ax^(2)+hxy+by^(2)+4gx+6f...

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

A

`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)`

Text Solution

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The correct Answer is:
B
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MARVEL PUBLICATION-PAIR OF STRAIGHT LINES-TEST YOUR GRASP
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