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If two pairs of straight lines having equations `y^(2)+xy-12x^(2)=0` and `ax^(2)+2hxy+by^(2)=0` have one line common, then a =

A

`-3(2h+3b)`

B

`8(h+2b)`

C

`2(b+h)`

D

`-3(b+h)`

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