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If one of the two lines 6x^(2)+xy-y^(2)=...

If one of the two lines `6x^(2)+xy-y^(2)=0` coincides with one of the two lines `3x^(2)-axy+y^(2)=0` ten

A

`a^(2)-3a+28=0`

B

`2a^(2)-a-28=0`

C

`2a^(2)-15a+28=0`

D

None of these

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The correct Answer is:
B
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MARVEL PUBLICATION-PAIR OF STRAIGHT LINES-TEST YOUR GRASP
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