Question

Using the following equation, find the center and radius of the circle by completing the square. x2 + y2 − 10x − 14y − 7 = 0 center: (−5, −7), r = 81 center: (−5, −7) r = 9 center: (5, 7), r = 81 center: (5, 7), r = 9

Answer 1

I dont understand the question?
to co.plete the square you have x2-10x+25+y2-14y+49=7+25+49 where 7+25+49 is the radius and -5,-7 is the center