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a^(2)x^(2)+2xy+9y^(2)=0 represent a pair...

`a^(2)x^(2)+2xy+9y^(2)=0` represent a pair of distinct lines then 'a' lies in

A

`[-(1)/(3),(1)/(3)]`

B

`(-(1)/(3),(1)/(3))`

C

`[-(1)/(2),(1)/(2)]`

D

`(-(1)/(2),(1)/(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
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