Question

Marvin was completing the square, and his work is shown below. Identify the line where he made his mistake. (2 points) 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)

Answer 1

Line 1

Explanation:

The first mistake is on line 1, where 2x^2 -8x is improperly factored as 2(x^2 -8x). It should be 2(x^2 -4x).