Re: maths problem
- From: Robert Low <mtx014@xxxxxxxxxxxxxx>
- Date: Wed, 09 Nov 2005 14:18:30 +0000
mm wrote:
I am having trouble with the following problem and was hoping you could spell it out for me. Algebra is my weak point, any help is greatly appreciated. Here goes...
Use the given zero to find the remaining zeros of this polynomial function.
p(x)=3x(cubed)-29x(squared)+92x+34; 5+3i
I'm taking an online course and am stuck on this principle. Your help is greatly appreciated.
If a is a zero of a polynomial in x, then (x-a) is a factor. Also relevant in this case, if a is a zero of a polynomial in x with real coefficients, so is the complex conjugate of a, a-bar. Then (x - a)(x - a-bar) is a factor. That gives you a quadratic which is a factor of your p; it is then straightforward to find the other factor. .
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