Equation of circle with centre (-a , -b)...

Equation of circle with centre `(-a , -b)` and radius ` sqrt(a^(2) - b^(2))` is

A

`x^2+y^2+2ax+2by+2b^2=0`

B

`x^2+y^2-2ax-2by-2b^2=0`

C

`x^2+y^2-2ax-2by+2b^2=0`

D

`x^2+y^2-2ax+2by+2b^2=0`

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