posted by Josh .
I'm working with finding roots of polynomial equations with degrees of 3 or higher. I have the equation
I used a graphing calculator to find the real roots of 1,-1
Then I did synthetic using -1, and I ended up with the equation
How do I get this to a quadratic so that I can find the imaginary roots? A friend suggested grouping, but I'm not real good at grouping, and I couldn't figure out how to factor it or group it. Any help would be appreciated.