(3-2y-8)^2+(y+7)^2 = (3-2y-12)^2 + (y-5)^2, 10y+25+14y+49 = 36y+81 -10y+25, 따라서 -2y = 32 따라서 y = -16 x = 35 즉 (35,-16)
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