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x2 + y2 - 10x + 4y - 52 = 0

x2 - 10x + y2 + 4y = 52 Complete the square

(x2 - 10x + 25) + (y2 + 4y + 4) = 52 + 25 + 4

(x - 5)2 + (y + 2)2 = 81

(x - 5)2 + (y - -2)2 = 92

This is the equation of a circle with center (5, -2), and radius 9.

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