Identifying the Center and Radius Given an Equation in General Form Identify the center and radius of a circle whose equation is x + y+10x-14y+ 58 = 0. Complete the square for the x- and y-terms. Group together the x-terms. (x+10x) + (y - 14y) Determine what value needs to be added to both sides of the equation to complete the square. (x+10x+ +(y-14y+ =-58+25+ 49 = 16 Factor the polynomials. (x+)+(y- Identify the center and radius. (A) 2 2 *(19) -25 X: 2 2 y: = 49 2 7)