Answer :

sqdancefan

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Answer:

  0 = x⁴ -x³ -9x² -11x -4

Step-by-step explanation:

Each root r contributes a factor of (x-r). The factored form of the polynomial of interest is ...

  0 = (x +1)³(x -4)

  0 = (x³ +3x² +3x +1)(x -4)

  0 = x⁴ -x³ -9x² -11x -4

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