Answer:
The missing value in last step is 3
Step-by-step explanation:
Given the function f(x)
Here some steps are given to write the above function in vertex form.
Step 1: Factor a out of the first two terms
Step 2: Form a perfect square trinomial.
Write the trinomial as a binomial squared.
By the identity of binomial square
Hence, the f(x) can be written as
Therefore, the missing value in last step is 3