Question

Given the following perfect square trinomial, fill in the missing term.

x^2 - 16x + ____

Answer 1

64

Answer 2

64

Answer 3

divide -16 by 2 = -8
and then square it
(-8)^2 = 64

Answer 4

in general it is

a^2 - 2ab + b^2

a=x
-2ab=-16x
so b=8

b^2 = 64