What the answer to this

Answer:
D
Step-by-step explanation:
(I solved in the picture, firstly look at there)
after completing the square and factoring :
[tex] {x}^{2} + 4x + 4 = 8 + 4[/tex]
[tex] {x}^{2} + 4x + 4 = 12[/tex]
[tex] {(x - 2)}^{2} = 12[/tex]
Hope this helps ^-^