1.

The radical centre of the circle x^2 + y^2 + 4x + 7 =0, 2 x^2 + 2y^2 + 3x + 5y+ 9 =0 and x^2 + y^2 + y =0 is

Answer»

`( -2 , -1)`
`( -2, 1)`
`( 2, -1)`
`(2, 1)`

ANSWER :A


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