If a - b = 3 and a(power 2) + b(power 2) = 29, find the value of ab.	Pick one: A) 5 B) 8 C) 4 D) 10 E) 3
2ab = (a(power 2) + b(power 2) - (a - b)(power 2)   = 29 - 9= 
<gadget id="calculator">29 - 9</gadget>
<output>20</output>
20   ab= 10.   Answer is 10.
<result>D</result>
If a - b = 3 and a(power 2) + b(power 2) = 29, find the value of ab.