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If the pair of lines ax^(2)+2hxy+by^(2)=...

If the pair of lines `ax^(2)+2hxy+by^(2)=0 (h^(2) gt ab)` orms an equilateral triangle with the line lr + my + n = 0 then (a+3b)(3a+b)=

A

`h^(2)`

B

`2h^(2)`

C

`3h^(2)`

D

`4h^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
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AAKASH SERIES-PAIR OF STRAIGHT LINES-EXERCISE -II
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  19. the orthocentre of the triangle formed by the lines x+y = 1 and 2y^(2)...

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