Answer :

dalendrk
[tex]f(x) = x^4 + 6x^3-3x^2 + 17x-15\\\\15:\{\pm1;\ \pm3;\ \pm5;\ \pm15\}\\1:\{\pm1\}\\\\Answer:\boxed{\{\pm1;\ \pm3;\ \pm5;\ \pm15\}}[/tex]

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