x2 + y2 + 14x + 10y - 47= 0 (complete the square to write the standard to write the standard form equation of each circle, identify the center and radius. )

Answer 1

(x² + 14x + 49) + (y² + 10y + 25) = 47 + 49 + 25

(x + 7)² + (y + 5)² = 121;

(-7, -5) is center; r = √121 = 11