1.

Let PQR be a right angle isosceles triangle, right angle 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+20x-10y+25=0`
`3x^(2)-3y^(2)+8xy-20x+10y+25=0`

ANSWER :A


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