Algebra: A Combined Approach (4th Edition)

$x^{2}$ + 6x + $y^{2}$ - 4y = 3 $(x+3)^{2}$ - 9 + $(y-2)^{2}$ - 4 = 3 $(x+3)^{2}$ + $(y-2)^{2}$ = 16 Centre = (-3, 2) Radius = 4