T:
+
1
1
1
1 + xa + x-b 1 + x + x-
1 + xb + x-c ' 1 + x + x-a
= 1
+

Which zero pair could be added to the function f(x) = x2 + 12x + 6 so that the function can be written in vertex form? o 3, -3o 6,629,-936, 36