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If the pairs of lines x^2+2x y+a y^2=0 a...

If the pairs of lines `x^2+2x y+a y^2=0` and `a x^2+2x y+y^2=0` have exactly one line in common, then the joint equation of the other two lines is given by

A

`3x^(2)+8xy-3y^(2)=0`

B

`3x^(2)+10xy+3y^(2)=0`

C

`y^(2)+2xy-3x^(2)=0`

D

`x^(2)+2xy-3y^(2)=0`

Text Solution

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The correct Answer is:
B
NA
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