Which equation represents the general form a circle with a center at (–2, –3) and a diameter of 8 units? x2 + y2 + 4x + 6y – 51 = 0 x² + y² – 4x – 6y – 51 = 0 x2 + y2 + 4x + 6y – 3 = 0 x2 + y2 – 4x – 6y – 3 = 0