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Mathematics 20 Online
OpenStudy (anonymous):

If 2+5i is a zero of the polynomial f(x), what is another zero of f(x)?

OpenStudy (bahrom7893):

2-5i

OpenStudy (anonymous):

how come?

OpenStudy (bahrom7893):

http://www.mathwords.com/c/conjugate_pair_thm.htm

OpenStudy (anonymous):

oh okay. well thanks

OpenStudy (agent0smith):

"That is, if a + bi is a zero then so is a – bi and vice-versa." This is the key part.

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