Question 474068
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
-4x^2-40x-100 = -4(x^2 + 10x + 25) = -4(x+5)(x+5) = -4(x+5)^2
                               
                                    F	First terms x^2
                                    O	Outside terms 5x
                                    I	Inside terms  5x
                                    L	Last terms    25