troycote69 troycote69

09-04-2018
Mathematics

contestada

Using the given zero, 2 - 4i, find one other zero of f(x) = x4 - 4x3 + 21x2 - 4x + 20

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Zepdrix Zepdrix

03-08-2018

For polynomials, complex zeros always come in conjugate pairs.

So if 2-4i is a zero of the given polynomial,

then 2+4i must be another.

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