If a - b = 3 and a(power 2) + b(power 2) = 25, find the value of ab. Choose the correct choice from the following answers.
A) 5  B) 8  C) 4  D) 10  E) 3
2ab = (a(power 2) + b(power 2) - (a - b)(power 2)   = 25 - 9= 
<gadget id="calculator">25 - 9</gadget>
<output>16</output>
16   ab= 8.   Answer is 8.
<result>B</result>
If a - b = 3 and a(power 2) + b(power 2) = 25, find the value of ab.