Find poly F(X) with lowest degree with ratio coeffs and 2 given zeros

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To find a polynomial of lowest degree with rational coefficients given the zeros 2 and 3-2i, the corresponding factors are (x-2), (x-3+2i), and (x-3-2i). The inclusion of the conjugate zero, 3+2i, ensures the polynomial has rational coefficients. The correct expression for the polynomial is (x-2)(x-3+2i)(x-3-2i). Multiplying these factors is necessary to confirm the polynomial's rationality. The discussion emphasizes the importance of verifying answers in polynomial problems.
helpmedude

Homework Statement


Find a polynomial function of lowest degree with rational coefficients and 2 and 3-2i as some of its zeros. Multiply the factors to make sure it has rational coefficients.

The Attempt at a Solution



zeros=2, 3-2i, 3+2i

I am not sure how write out the factors?

(x-2)(x-3+2i)(x-3-2i) is this correct?
 
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helpmedude said:
Find a polynomial function of lowest degree with rational coefficients and 2 and 3-2i as some of its zeros. Multiply the factors to make sure it has rational coefficients.

I am not sure how write out the factors?

(x-2)(x-3+2i)(x-3-2i) is this correct?

Yes! :biggrin:

hmm :rolleyes: … it said multiply the factors … but why when they're obviously rational … hmm …

are you sure the question isn't "2 and 3 - √2i"?
 
I am not to sure. nope it is for sure 2 and 3-2i. maybe its supposed to just be an encouragement to always check ones answers.
 
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