## Algebra: A Combined Approach (4th Edition)

Centre = (2, 4), Radius = $\sqrt22$
$x^{2}$ - 4x + $y^{2}$ - 8y - 2 = 0 $(x-2)^{2}$ - 4 + $(y-4)^{2}$ - 16 - 2 = 0 $(x-2)^{2}$ + $(y-4)^{2}$ = 22 Centre = (2, 4) Radius = $\sqrt22$