Math Question
![A certain circle can be represented by the following equation.
\[
x^{2}+y^{2}-4 x-12 y-9=0
\]
What is the center of this circle?
What is the radius of this circle?
units
Show Calculator](https://d3hlidq5bf9vg0.cloudfront.net/app-server-student/2022/4/26/b5bfc6e5-80b0-4db8-8cad-35fb8f4a2366.png "A certain circle can be represented by the following equation.
\[
x^{2}+y^{2}-4 x-12 y-9=0
\]
What is the center of this circle?
What is the radius of this circle?
units
Show Calculator")
Solution
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