1.

If the pair of lines x^2+2xy+ay^2=0 and ax^2+2xy+y^2=0 have exactly one line in common, then the joint equation of the other two lines is given by

Answer»

`3x^2+8xy-3y^2=0`
`3x^2+10xy+3y^2=0`
`3x^2+2xy-3y^2=0`
`x^2+2xy-3y^2=0`

ANSWER :B


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