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The equation 3x^2+2hxy+3y^2=0 represents...

The equation `3x^2+2hxy+3y^2=0` represents a pair of straight lines passing through the origin . The two lines are

A

real and distinct if `h^2gt3`

B

real and distinct if `h^2gt9`

C

real and coincident if `h^2gt12`

D

real and coincident if `h^2gt3`

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The correct Answer is:
A
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