The task is to generate the correct answer for a given math problem.

Problem: the area of a triangle is with base 12 m and height 5 m ?
30 m 2

Problem: one night 17 percent of the female officers on a police force were on duty . if 204 police officers were on duty that night and half of these were female officers , how many female officers were on the police force ?
600

Problem: if ( x + 3 ) ^ 2 / ( 3 x + 5 ) = 2 , then the difference between the two possible values of x is :
2