Find the equation of the circle in standard form for the given center (h, k) and radius r: (h, k) = (5, 4), r = 2
(x − 5)2 + (y − 4)2 = 4(x + 5)2 + (y + 4)2 = 2(x + 5)2 + (y + 4)2 = 4(x − 5)2 + (y − 4)2 = 2