Write x2 - 8x + 13 = 0 in the form (x - a)2 = b, where a and b are integers.
(x - 4)2 = 3
(x - 3)2 = 2
(x - 2)2 = 1
(x - 1)2 = 4
(x - 4)2 = 3
(x - 3)2 = 2
(x - 2)2 = 1
(x - 1)2 = 4