Friday

January 30, 2015

January 30, 2015

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

I need help with my precalc hw.

we are learning about finding zeros

I dont 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 4:38pmWell, 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 4:39pmwhat 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 4:42pmyou get

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

what do i do next?

**Answer this Question**

**Related Questions**

PreCalc (still confused) - Hello and Happy Halloween! Trying to get this problem...

precalc - find the zeros of the function: f(x)=x^3+2x^2-109x-110 I think I need ...

PreCalc (Just Can't Comprehend) - Find the dimensions of the rectangle with ...

Precalc - how do u find the zeros of x^3+13x^2-16x+8? w/o a calc?

trig/PreCalc - Find all real zeros of the function y = -7 + 4

Precalc - Hello, i need help doing a proof, im pretty sure on how to do it but ...

PreCalc - Hello and Happy Halloween! Trying to get this problem and could use ...

PreCalc - Find all real zeros of the polynomial f(x)= x^4 -130x^2+3969 and ...

precalc - I am stuck on this one problem and think it might be the teachers ...

Precalc - I dont know if i did this correctly is(x-1) a factor of 17x^10+16x^6+1...