A certain circle can be represented by the following equation.
$x^2+y^2-6x-6y+2=0$
**What is the center of this circle** ?
$($[[☃ math-keypad 1]] $,$ [[☃ math-keypad 2]]$)$
**What is the radius of this circle** ?
[[☃ math-keypad 3]] units
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