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If a x^(2)+2 h x y+b y^(2)+2 g x+2 f y+c...

If `a x^(2)+2 h x y+b y^(2)+2 g x+2 f y+c=0` represents a parallel lines, then

A

`h f=b g`

B

`h^(2)=b c`

C

`a^(2) f=b^(2) g`

D

none of these

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The correct Answer is:
A
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HIMALAYA PUBLICATION-Pair Of Lines-QUESTION BANK
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