If a - b = 2 and a2 + b2 = 25, find the value of ab.	Pick one.
A) A)10.5  B) B)12  C) C)15  D) D)18  E) E)20
Explanation:   2ab = (a2 + b2) - (a - b)2   = 25 - 4= 
<gadget id="calculator">25 - 4</gadget>
<output>21</output>
21   ab=10.5   10.5nswer: 10.5
<result>A</result>
If a - b = 2 and a2 + b2 = 25, find the value of ab.