The equation (x + 6)^2 + (y + 4)^2 = 36 models the position and range of the source of a radio signal. Describe the position of the source and the range of the signals
A circle equation is : ( x - p )² + ( y - q )² = r², where p and q are coordinates of the center. The position of the source is : ( - 6, - 4 ) and the range : r² = 36 ⇒ r = 6
