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17 June, 11:15

Factor completely 4x3 + 28x2 + 7x + 49.

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Answers (2)
  1. 17 June, 11:57
    0
    (x+7) (4x²+7) is the correct answer
  2. 17 June, 13:29
    0
    Try grouping in paires

    4x^3 + 28x^2 + 7x + 49

    = 4x^2 (x + 7) + 7 (x + 7) - note that (x + 7) is common to the 2 parts, so

    = (4x^2 + 7) (x + 7)
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