1. The problem statement, all variables and given/known data Equation: x^2+y^2-6x-2y+8=0 Find the center and the radius. (Help) : Find the equation of the tangent to the circle above that passes through the beginning of axis O (0,0) 3. The attempt at a solution I found the center and radius and i believe the values are : C (3,1) and R =root(2) but can you explain me the second one Sorry for my english. I hope you'll understand it. Thank you.