It just how do i prove that(adsbygoogle = window.adsbygoogle || []).push({});

b^3 +b^2 +1 does not divide by 5

Im thinking this way,

cause i know that b^3 +b^2 +1 is not congruent to 0(mod5)

therefore we use contradition to prove it. im just not sure how to use contradition? or maybe im looking at this in a completely bad light? maybe there is another method?

**Physics Forums - The Fusion of Science and Community**

# Proving with Congruence of intergers

Have something to add?

- Similar discussions for: Proving with Congruence of intergers

Loading...

**Physics Forums - The Fusion of Science and Community**