Marvin was completing the square, and his work is shown below. identify the line where he made his mistake.

f(x) = 2x2 − 8x + 5
line 1: f(x) = 2(x2 − 8x) + 5
line 2: f(x) = 2(x2 − 8x + 16) + 5 − 32
line 3: f(x) = 2(x − 4)2 − 27

line 1
line 2
line 3
he did not make any mistakes