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

f(x) = 2x^2 − 8x + 5
Line 1: f(x) = 2(x − 8x) + 5
Line 2: f(x) = 2(x − 8x + 16) + 5 − 16
Line 3: f(x) = 3(x − 4)^2 − 11

A. Line 1

B. Line 2

C. Line 3

D. He did not make any mistakes

Question

Marvin was completing the square and his work is shown below. Identify the line where he made his mistake.

f(x) = 2x^2 − 8x + 5
Line 1: f(x) = 2(x − 8x) + 5
Line 2: f(x) = 2(x − 8x + 16) + 5 − 16
Line 3: f(x) = 3(x − 4)^2 − 11

A. Line 1

B. Line 2

C. Line 3

D. He did not make any mistakes

anonymous · Answer

Line 1: f(x) = 2(x − 8x) + 5, he needs to factor out 2 properly..