If a-b= 10 and a^2+b^2=150, find the value of ab	Options.
A) 10  B) 12  C) 25  D) 18  E) 19
2ab = (a^2 + b^2) - (a - b)^2   = 150 - 100= 
<gadget id="calculator">150 - 100</gadget>
<output>50</output>
50=&gt; ab = 25   ANSWER: 25
<result>C</result>
If a-b= 10 and a^2+b^2=150, find the value of ab