nathaliee3115 nathaliee3115
  • 03-03-2018
  • Mathematics
contestada

Write a polynomial function of f of least degree with rational coefficients a leading coefficient of 1 and the given zeros -5 2i

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jcherry99
jcherry99 jcherry99
  • 08-03-2018
If I'm reading this correctly, it is 
y = (x + 5)(x + 2i)(x - 2i) = (x - 5)(x^2 + 4)
which expands to
y = x^3 + 5x^2 + 4x + 20
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