If a - b = 3 and a(power 2) + b(power 2) = 23, find the value of ab. Choose the correct option
A) 5  B) 8  C) 7  D) 10  E) 3
2ab = (a(power 2) + b(power 2) - (a - b)(power 2)   = 23 - 9= 
<gadget id="calculator">23 - 9</gadget>
<output>14</output>
14   ab= 7.   Answer is 7.
<result>C</result>
If a - b = 3 and a(power 2) + b(power 2) = 23, find the value of ab.