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If the equation ax^(2)+ay^(2)+2gx+2fy+c=...

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

A

`g^(2)+f^(2)=1/2`

B

`f^(2)-g^(2)=1`

C

`f^(2)+g^(2)=1`

D

`g^(2)-f^(2)=0`

Text Solution

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The correct Answer is:
C
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TARGET PUBLICATION-PAIR OF STRAIGHT LINES-CRITICAL THINKING
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