1.

An equation of a common tangent to the circle x ^(2) + y ^(2) + 14 x - 4y + 28 =0 and x ^(2) + y ^(2) - 14 x + 4y - 28 =0 is

Answer»

`x-7=0`
`y + 7=0`
`28X + 45 y + 371=0`
NONE of these

ANSWER :C


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