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If the acute angle between the lines ax^...

If the acute angle between the lines `ax^(2)+2hxy+by^(2)=0` is congruent to the acute angle between the lines `3x^(2)-7xy+4y^(2)=0`, then

A

`4(h^(2)-ab)=(a+b)^(2)`

B

`7(h^(2)-ab)=(a+b)^(2)`

C

`49(h^(2)-ab)=(a+b)^(2)`

D

`196(h^(2)-ab)=(a+b)^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
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NIKITA PUBLICATION-PAIR OF STRAIGHT LINES-MULTIPLE CHOICE QUESTIONS
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