If (x+3)^2/(2x+15)=3, then the difference between the two possible values of x is:	Choose the correct choice from the following options:
A) 8
B) 10
C) 12
D) 14
E) 16

Rationale: ( x + 3 ) ^ 2 / ( 2 x + 15 ) = 3 ( x + 3 ) ^ 2 = 3 ( 2 x + 15 ) x ^ 2 + 6 x + 9 = 6 x + 45 x ^ 2 - 36 = 0 ( x - 6 ) ( x + 6 ) = 0 x = 6 or x = - 6 the answer is c .
Answer: C