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23 July, 13:17

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

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  1. 23 July, 13:38
    0
    I agree it should be line 1
  2. 23 July, 14:51
    0
    Line 1: f (x) = 2 (x - 8x) + 5 because 2 wasn't correctly factored out.

    What it should say is:

    f (x) = 2 (x2 - 4x + 4) + 5 - 8
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