Question 481828
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
(7&#8730;3-6)(7&#8730;3+6)= 49*3 - 36 = 111
F	First terms 49*3
O	Outside terms 6*7&#8730;3
I	Inside terms -6*7&#8730;3
L	Last terms  -36