If a - b = 3 and a^2 + b^2 = 33, find the value of ab.	Choose the correct choice from the following choices.
A) 12
B) 15
C) 10
D) 18
E) 13
2ab = (a^2 + b^2) - (a - b)^2   = 33 - 9= 
<gadget id="calculator">33 - 9</gadget>
<output>24</output>
24   ab= 12.   12nswer is 12.
<result>A</result>
If a - b = 3 and a^2 + b^2 = 33, find the value of ab.