Let
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be polynomials and let
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be a polynomial of degree
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whose roots
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are distinct. Construct with the aid of the polynomials
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a polynomial
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of degree
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that has the roots
%V0
Let $P,Q,R$ be polynomials and let $S(x) = P(x^3) + xQ(x^3) + x^2R(x^3)$ be a polynomial of degree $n$ whose roots $x_1,\ldots, x_n$ are distinct. Construct with the aid of the polynomials $P,Q,R$ a polynomial $T$ of degree $n$ that has the roots $x_1^3 , x_2^3 , \ldots, x_n^3.$