Table 2 Divided difference table of y = x²

x  y  First Divided  Second Divided  Third Divided
      Difference     Difference      Difference
-----------------------------------------------------
1  1
      9 - 1
      ------ = 4
      3 - 1
3  9                 5 - 4
                     ------ = 1
                     2 - 1
      4 - 9                          1 - 1
      ----- = 5                      ----- = 0
      2 - 3                          5 - 1
2  4                 7 - 5
                     ----- = 1
                     5 - 3
      25 - 4
      ---- = 7
       5-2
5  25