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OpenStudy (anonymous):
Help please!! The equation x2 + y2 − 2x + 2y − 1 = 0 is the general form of the equation of a circle. What is the standard form of the equation? A. (x − 1)2 − (y − 1)2 = 1 B. (x − 1)2 + (y + 1)2 = 3 C. (x + 1)2 + (y − 1)2 = 1 D. (x − 1)2 + (y + 1)2 = 1
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OpenStudy (anonymous):
It's not C.
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