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ZX-870B598024Circles · 第 17 题
Circles · 原库模块 1 · Q17 原库参考解析
A circle in the xy-plane has its center at (-5, 2) and has a radius of 9. An equation of this circle is x2 + y2 + ax + by + c = 0, where a, b, and c are constants. What is the value of c ?
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