Question

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

Answer 1

do you know what it is? i am currently taking the test. would be a lot of help :)