# Remaining zeros?

• November 9th 2008, 04:04 PM
Remaining zeros?
Information is given about a complex polynomial f(x) whose coefficients are real numbers. Find the remaining zeros for f.
Degree 3; zeros 1, 2 - i
Can someone explain how to do this?
• November 9th 2008, 04:12 PM
Plato
Quote:

The other root is $2+i$.
If a polynomial with real coefficients has a complex root $z$ then $\overline z$ is also a root.