1.

Let PQR be right angled isoscles triangle right angled at P (2,1). If the equation of the line QR is 2x+y=3. Then the equation representing the pair of lines PQ and PR is

Answer»

`3x^2-3y^2+8xy+20x+10y+25=0`
`3x^2-3y^2+8xy-20x-10y+25=0`
`3x^2-3y^2+8xy+10x+15y+25=0`
`3x^2-3y^2-8xy-15y-20=0`

ANSWER :B


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