$\"\"$

\

Let $\"\"$ and $\"\"$ .

\

Center $\"\"$

\

$\"\"$ (Substitute $\"\"$ and $\"\"$

\

$\"\"$ (Simplify)

\

$\"\"$ (Divide) $\"\"$

\

Distance $\"\"$

\

$\"\"$ (Substitute $\"\"$ and $\"\"$ )

\

$\"\"$ (Simplify)

\

$\"\"$ (Evalute powers)

\

$\"\"$ (Add: $\"\"$ )

\

Hence radius $\"\"$

\

$\"\"$ (Substitute $\"\"$ )

\

$\"\"$ $\"\"$ (Equation of a circle)

\

$\"\"$ (Substitute $\"\"$ , $\"\"$ and $\"\"$ ) $\"\"$ (Simplify)

\

$\"\"$ (Divide: $\"\"$ ) $\"\"$

\

The Equation of a circle is $\"\"$ .