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Mathematics, 29.06.2019 10:00 mia2286

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(x2 + 2x) ? 7 line 2: f(x) = 3(x2 + 2x + 1) ? 7 ? 1 line 3: f(x) = 3(x + 1)2 ? 8

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