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consider two curves ax^2+4xy+2y^2+x+y+5=...

consider two curves `ax^2+4xy+2y^2+x+y+5=0` and `ax^2+6xy+5y^2+2x+3y+8=0` these two curves intersect at four cocyclic points then find out `a`

A

4

B

`-4`

C

6

D

`-6`

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The correct Answer is:
B
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