For any a and b that satisfy |a – b| = b – a and a > 0, then |a + 7| + |-b| + |b – a| + |ab| =	Choose the correct choice from the following options
A) a-2b-7	B) ab + 2b + 7	C) a+b+7	D) 2a-2b+8	E) 3a-3b-7
Observation-1: |a – b| = b – a   which is possible only when signs of a and b are Same   Since Given a &gt; 0   so we figure out that a and b are both positive   Observation-2: |a – b| must be Non-Negative and so should be the value of b-a which is possible only when absolute value of b is greater than or equal to absolute value of a   Now you may choose the values of a and b based on above observations   e.g. b = 7 and a=1 and check the value of given functions and options   |a + 7| + |-b| + |b – a| + |ab| = |1 + 7| + |-7| + |7 – 1| + |1*7| = 28   ab + 2b + 7= 1*7+14+7= 
<gadget id="calculator">1*7+14+7</gadget>
<output>28</output>
28   all other options are not equal to 28   Answer : ab + 2b + 7
<result>B</result>
For any a and b that satisfy |a – b| = b – a and a > 0, then |a + 7| + |-b| + |b – a| + |ab| =