Write the equation of the circle in general form with a radius $r=5$ if the line $x-2 y-1=0$ is a tangent to this circle at point $(3,1)$.

Name: Write the equation of the circle in general form with a radius $r=5$ if the line $x-2 y-1=0$ is a tangent to this circle at point $(3,1)$.
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The Answer of Write the equation of the circle in general form with a radius $r=5$ if the line $x-2 y-1=0$ is a tangent to this circle at point $(3,1)$.

Write the Equation of the Circle in General Form with a Radius