Question 620166
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
 {{{a^2 + 2ab - 80b^2 }}}
factoring
  (a+10b)(a - 8b)
F	First terms   a^2
O	Outside terms -8ab
I	Inside terms  10ab
L	Last terms    -80b^2