Answers

2014-03-17T19:35:36+08:00
The equation of a circle is given by:
(x-h)^{2} + (y-k)^{2}=r^{2}

Taking the vector from B to A, we get:
(x-(1-(-6))^{2}  + (y-(8-7))^{2}=5^{2}

Refining,
(x-7)^{2} + (y-1)^{2}=25

I hope it's right.
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