What is the general form of the equation for the given circle? x2 y2 − 8x − 8y 23 = 0 x2 y2 − 8x − 8y 32 = 0 x2 y2 − 4x − 4y 23 = 0 x2 y2 4x 4y 9 = 0

We know that
the standard form of the equation of the circle is 

where 
(h,k) is the center
r is the radius

case a) 

Is a circle
with radius r= units
and center

case b) 

Is not a circle

case c)

Is not a circle

case d)

Is not a circle

therefore 

the answer is

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