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26 February, 23:14

Which polynomial function has a leading coefficient of 1, roots - 3 and 8 with multiplicity 1, and root 4 with multiplicity 2?

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Answers (2)
  1. 26 February, 23:41
    0
    Is it multiple choice or short answer
  2. 26 February, 23:42
    0
    It will be a polynomial of degree 4 because it has 4 roots.

    written as factors it is

    (x + 3) (x - 8) (x - 4) ^2

    expanding:-

    = (x^2 - 5x - 24) (x^2 - 8x + 16)

    = x^4 - 8x^3 + 16x^2 - 5x^3 + 40x^2 - 80x - 24x^2 + 192x - 384

    = x^4 - 13x^3 + 32x^2 + 112x - 384
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