I get this far, and then i get stuck..i dont know what to do...when I multiply by (X + 8i), i keep getting the wrong answer..could someone please help me? Thank you
Follow Math Help Forum on Facebook and Google+
If you want all real coefficients, then the complex roots must occur in conjugate pairs. So use {-3,4,8i,-8i} four roots give four factors.
Now I get x^2 - x - 12 (x^2 - 64i^2) Now do I multiply those together?
Last edited by aikenfan; Sep 28th 2007 at 02:42 PM.
x^4 - x^3 + 52x^2 - 768
Originally Posted by aikenfan x^4 - x^3 + 52x^2 - 768 You missed a term. x^4 - x^3 + 52x^2 -64x - 768
Thank you for all of your help
View Tag Cloud