Question 1081946
<Line of the two given points,</pre>
{{{m=(-2-0)/(7-5)=-2/2=1}}}-------MISTAKEN  FIRST RESULT


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{{{-1/m=-1}}}
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{{{x[m]=12/2=6}}}
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{{{y[m]=(-2+0)/2=-1}}}
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{{{y-0=-1(x-5)}}}
{{{y=-x+5}}}

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Center of circle should be the intersection of y=-x+5 and x-2y-9=0.
{{{x-2(5-x)-9=0}}}
{{{x-10+2x-9=0}}}
{{{x=-9+10}}}
{{{x=1}}},{{{y=4}}}
Center (1,4).

Radius-squared:
{{{(5-1)^2+(0-4)^2}}}
{{{16+16}}}
{{{32}}}


EQUATION:  {{{cross((x-1)^2+(y-4)^2=32)}}}