Question

help with number 10b.

Answer 1

heres my work.

Answer 2

@Hero

Answer 3

i think this a true stmt?

Answer 4

Your work looks right. I'm going offline. I have to finish my own work.

Answer 5

oh okay, thanks :)

Answer 6

Another way of solving this is :

If \[a≡ 2 [ \mod8]\]

This means that

\[a=8k+2 (k \in \mathbb{Z}^)\]

Squaring this expression will complete your proof.