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OpenStudy (lisa123):
Find a polynomial function with real coefficients that has the given zeros. (There are many correct answers.) 4,-2i
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OpenStudy (anonymous):
if it has real coefficients then if z is a root so is z*
OpenStudy (anonymous):
z* is complex conjugate
OpenStudy (anonymous):
so, F(x)=a(x-4)(x-2i)(x+2i)
OpenStudy (anonymous):
can you go on from here?
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