Evaluate the integral by completing the square and using the following formula: dx x2 - a2 = 1/2a ln|x|. What is the value of the integral?

A) 1/2a ln|x| + C
B) 1/2a ln|x| - C
C) 1/2a ln|x| + a2
D) 1/2a ln|x| - a2