For any non-zero a and b that satisfy |ab| = ab and |a| = -a
|b + 4| + |ab - b| = ?	Select the correct option
A) a) ab - 4  B) b) 2b - a - 4  C) c) ab - 2b - 4  D) d) ab - 2b + 4  E) e) 4 - ab
|a| = -a Suggests that 'a' is Negative   |ab| = ab Suggests that 'ab' is Positive   'ab' is Positive Suggests that 'a' and 'b' have same Sign i.e. either both positive or both negative   But since 'a' is Negative therefore 'b' is Negative too.   Since b is negative so |b - 4| = -b-4   Since ab is Positive and b is Negative so |ab - b| = ab - b   i.e. |b + 4| + |ab - b| = -b-4 + ab - b =ab - 2b - 4   Answer: Option c) ab - 2b - 4
<result>C</result>
For any non-zero a and b that satisfy |ab| = ab and |a| = -a
|b + 4| + |ab - b| = ?