[" 12.The equation of auxiliary circle o...

[" 12.The equation of auxiliary circle of the ellipse "16x^(2)+25y^(2)+32x-100y=284" is "],[[" (A) "x^(2)+y^(2)+2x-4y-20=0," (B) "x^(2)+y^(2)+2x-4y=0],[" (C) "(x+1)^(2)+(y-2)^(2)=400," (D) "(x+1)^(2)+(y-2)^(2)=225]]

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