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 November 12th, 2018, 03:14 PM #1 Newbie   Joined: Nov 2018 From: USA Posts: 1 Thanks: 0 Finding polynomial of a given degree with given zeros: complext zeros I am stuck on this topic in pre-calculas class. I have practiced and read, watched videos and still stuck. Find polynomial f(x) of degree 4 with real coefficients and the follosing zeros -1,2,-3+i Thanks November 12th, 2018, 03:23 PM   #2
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 Originally Posted by mathgeek83 I am stuck on this topic in pre-calculas class. I have practiced and read, watched videos and still stuck. Find polynomial f(x) of degree 4 with real coefficients and the follosing zeros -1,2,-3+i Thanks
if a polynomial has a complex zero of the form $a+bi$, then its conjugate $a-bi$ is also a zero.

zeros would be $\{ -1, 2, -3 + i, -3-i \}$ November 12th, 2018, 03:37 PM   #3
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 Originally Posted by skeeter if a polynomial has a complex zero of the form $a+bi$, then its conjugate $a-bi$ is also a zero. zeros would be $\{ -1, 2, -3 + i, -3-i \}$
Skeeter! good to see you sir.

Have a great set of holidays over the rest of 2018. November 12th, 2018, 07:21 PM   #4
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 Originally Posted by skeeter if a polynomial with real coefficients has a complex zero of the form $a+bi$, then its conjugate $a-bi$ is also a zero. zeros would be $\{ -1, 2, -3 + i, -3-i \}$
Fixed it for you. Tags complext, degree, finding, polynomial, zeros Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post Smoofwah Algebra 1 December 12th, 2016 04:43 AM daigo Algebra 4 June 26th, 2012 01:19 PM katweena Algebra 11 June 16th, 2011 11:38 AM brakson Algebra 2 February 13th, 2008 12:57 PM jokerthief Algebra 3 November 4th, 2007 03:52 PM

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