The equation of the circle passing through the foci of the ellipse 9x² + 16y² = 144 and having its center at (2, -1) is:
1
x² + y² - 4x + 2y - 7 + 4√7= 0
2
x² + y² + 4x - 2y - 7 + 4√7 = 0
3
x² + y² - 4x - 2y - 7 + 4√7 = 0
4
x² + y² + 4x + 2y - 7 + 4√7 = 0