Question 470306
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
(64-81r^2) = (8+9r)(8-9r) 
F	First terms 64
O	Outside terms -72r
I	Inside terms  +72r
L	Last terms  -81r^2

(64-81r^2) is the LCD