1.

If A = (1, 2), B = (2,1) and P is a variable point satisfying the condition |PA - PB| = 3, then the locus of P is

Answer»

`8x^2 + 2xy + 8y^2 + 27x + 27y + 45 =0`
`4x^2 + XY + 4y^2 - 27x - 27y + 90 = 0`
`32x^2 + 8XY + 32y^2 -108 x - 108 y + 99 = 0 `
`8x^2 - 2xy + 8y^2 - 27x - 27y + 45 = 0`

Answer :C


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