Wednesday
October 1, 2014

Homework Help: Pre Calc

Posted by Zach on Friday, November 13, 2009 at 10:35pm.

I am familiar with this type of problem but can't seem to get the right answer.

Use the given zero to find the remaining zeros of each function

f(x)=x^4-9x^3+7x^2-91x-348,zero 5-2i

I normally would use synthetic division with the root 5-2i bringing it down to x^3. Then synthetic with 5+2i, bring it down to a quadratic solve the quadratic then I'll have zeros, but I can't get past the 5-2i with the synthetic division. Every time I do it I can't get it to equal zero. I have done it multiple times and it won't work.

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