1: Find the equation of a polynomial with given zeros
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For this problem, we are given the zeros of a polynomial, we need to determine its expression.
The zeros are:
[tex]1,1,2+\sqrt{2},2-\sqrt{2}[/tex]Therefore we can write:
[tex]\begin{gathered} f(x)=(x-1)^2(x-2+\sqrt{2})(x-2-\sqrt{2})\\ \\ f(x)=(x^2-2x+1)(x^2-4x+2)\\ \\ f(x)=x^4-4x^3+2x^2-2x^3+8x^2-4x+x^2-4x+2\\ \\ f(x)=x^4-6x^3+11x^2-8x+2 \end{gathered}[/tex]The correct answer is option A.