Find a necessary and sufficient condition onA,B,C,D, andEforAx^2 +By^2 +Cx+Dy+E= 0 to be an equation of a circle.

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- November 13th 2010, 12:35 PMMATNTRNGCircle Problem
Find a necessary and sufficient condition on

*A*,*B*,*C*,*D*, and*E*for*Ax*^2 +*By*^2 +*Cx*+*Dy*+*E*= 0 to be an equation of a circle. - November 13th 2010, 12:39 PMPlato
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