solve-in-Z-x-3-2x-1-1-4-

Question Number 120471 by mathocean1 last updated on 31/Oct/20

s o l v e i n Z x^{3} + 2 x + 1 \equiv 1 [4]

Answered by Ar Brandon last updated on 31/Oct/20

x^{3} + 2 x + 1 = 1 [4] \Rightarrow x^{3} + 2 x = 0 [4]

\Rightarrow x^{3} + 2 x = 4 k, k \in Z

x = 2 m, m \in Z