Posted by **Samya** on Tuesday, October 14, 2008 at 4:06pm.

Hello, good afternoon.

I need help with my precalc hw.

we are learning about finding zeros

I don't which method I should use for this problem:

if i is a zero of x^3+3x^2+ix+(4+i)

what do i do? synthetic divison? or long division?

when i did long division i got a werid polynomial with a lot of 'i's in them what do I do with that?

Thanks!

- Precalc -
**bobpursley**, Tuesday, October 14, 2008 at 4:38pm
Well, looking at the i in the end, you know one root has to be i. Start with it, and do division, I might suggest synthetic division.

- Precalc -
**Samya**, Tuesday, October 14, 2008 at 4:39pm
what do u mean looking atthe end "you know one root has to be i" what does that mean?

- Precalc -
**Samya**, Tuesday, October 14, 2008 at 4:42pm
you get

x^2+(3+i)x+(4i-1)

what do i do next?

## Answer This Question

## Related Questions

- Pre Calc - I am familiar with this type of problem but can't seem to get the ...
- Pre Calc (For Reiny) - Thanks so much your method worked perfectly! My solution ...
- Factoring- precalc - im stuck on factoring (x-1)(2x^3+13x^2+8x-35) do i use ...
- Precalc factoring - im stuck on factoring (x-1)(2x^3+13x^2+8x-35) do i use ...
- math- finding zeros - Using the given zero, find all the zeroes and write a ...
- PreCalc (still confused) - Hello and Happy Halloween! Trying to get this problem...
- Precalc - Given g(x) = (x + 5)(x2 - 6x + 13), find the one real zero of g(x): I ...
- precalc - find the zeros of the function: f(x)=x^3+2x^2-109x-110 I think I need ...
- Factor Theorem Math - Use the Factor Theorem to determine the rational zeros of ...
- Rational Zero Theorem - I know how to solve if the leading coefficient is 1, but...

More Related Questions