Question 667930
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
(a - 2/5)(a + 5/2) = x^2 + (21/10)a - 1
F	First terms  a^2
O	Outside terms  5/2a
I	Inside terms  -2/5a   {{{ (5/2)a -(2/5)a =(25/10)a -(4/10)a= (21/10)a  }}}
L	Last terms   -10/10