1.

Length of the common chord of the circles (x -1) ^(2) + (y + 1)^(2) = c ^(2) and (x +1) ^(2) + (y-1) ^(2) =c^(2) is

Answer»

`1/2 SQRT (C^(2) -2)`
`sqrt (c ^(2) -2)`
`2 sqrt ( c ^(2) -2)`
`c + 2`

ANSWER :C


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