The equation 3ax^2+9xy+(a^2-2)y^2=0 repr...

The equation `3ax^2+9xy+(a^2-2)y^2=0` represents two perpendicular straight lines for

A

a) only one value of a

B

b) for all values of a

C

c) for only two values of a

D

d) for no value of a

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The correct Answer is:

C

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