Question

Madeline was completing the square and her work is shown below. Identify the line where she made her mistake. f(x) = 3x2 + 6x - 7 Line 1: f(x) = 3(x + 2x) - 7 Line 2: f(x) = 3(x + 2x + 1) - 7 - 1 Line 3: f(x) = 3(x + 1)2 - 8

Answer 1

Try completing the square on your own, then see where your answer is different than Madeline's.