If a - b = 3 and a2 + b2 = 29, find the value of ab?	Select
A) 10	B) 12	C) 14	D) 17	E) 18
2ab = (a2 + b2) - (a - b)2   = 29 - 9= 
<gadget id="calculator">29 - 9</gadget>
<output>20</output>
20   ab= 10   10)
<result>A</result>
If a - b = 3 and a2 + b2 = 29, find the value of ab?