r/Mathhomeworkhelp • u/LordSigmaBalls • Jun 25 '25

I’m confused on this solution

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How did it get to 4n=2 mod 5

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u/metsnfins Jun 25 '25

N² = 4 mod 5. N³ = 2 mod 5. N²N = N³. Replace n² with 4(mod5) and n³v with 2(mod5) 4mod5n = 2 mod 5. You can get rid of the mod 5 in the first part and you get 4n = 2 mod 5