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The complete factorization of $\bar{f}(x)$ over $\mathbb{Z}_3$ is $(x - 1)(x + 1)(x^2 + 2x + 2)$. This is found by identifying the linear factors $(x-1)$ and $(x+1)$ through evaluation, performing polynomial division to find the quadratic factor, and verifying its irreducibility.

Conditions: The polynomial is $\bar{f}(x) = x^4 + 2x^3 + x^2 + x + 1$.; The field is $\mathbb{Z}_3$.

The complete factorization of $\bar{f}(x)$ over $\mathbb{Z}_3$ is $(x - 1)(x + 1)(x^2 + 2x + 2)$. This is found by identifying the linear factors $(x-1)$ and $(x+1)$ through evaluation, performing polynomial division to find the quadratic factor, and verifying its irreducibility.

Conditions: The polynomial is $\bar{f}(x) = x^4 + 2x^3 + x^2 + x + 1$.; The field is $\mathbb{Z}_3$.