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29-07-2015
Mathematics

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A third degree polynomial equation with rational coefficients that has roots -4 and 2+i

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29-07-2015

If one of the roots is 2+i, another must be 2-i. We can express this polynomial as (x+4)(x-2-i)(x-2+i). This expands to [tex]x^3-11x+20[/tex].

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