M mathgeek83 Nov 2018 1 0 USA Nov 12, 2018 #1 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

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

skeeter Math Team Jul 2011 3,276 1,769 Texas Nov 12, 2018 #2 mathgeek83 said: 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 Click to expand... if a polynomial has a complex zero of the form $a+bi$, then its conjugate $a-bi$ is also a zero. zeros would be $\{ -1, 2, -3 + i, -3-i \}$ Reactions: 1 person

mathgeek83 said: 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 Click to expand... if a polynomial has a complex zero of the form $a+bi$, then its conjugate $a-bi$ is also a zero. zeros would be $\{ -1, 2, -3 + i, -3-i \}$

romsek Math Team Sep 2015 2,885 1,609 USA Nov 12, 2018 #3 skeeter said: if a polynomial has a complex zero of the form $a+bi$, then its conjugate $a-bi$ is also a zero. zeros would be $\{ -1, 2, -3 + i, -3-i \}$ Click to expand... Skeeter! good to see you sir. Have a great set of holidays over the rest of 2018. Reactions: 1 person

skeeter said: if a polynomial has a complex zero of the form $a+bi$, then its conjugate $a-bi$ is also a zero. zeros would be $\{ -1, 2, -3 + i, -3-i \}$ Click to expand... Skeeter! good to see you sir. Have a great set of holidays over the rest of 2018.

J JeffM1 May 2016 1,310 551 USA Nov 12, 2018 #4 skeeter said: 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 $\{ -1, 2, -3 + i, -3-i \}$ Click to expand... Fixed it for you.

skeeter said: 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 $\{ -1, 2, -3 + i, -3-i \}$ Click to expand... Fixed it for you.