Hello
I've been having difficulty with understanding a concept within modular arithmetic
The question I have been stuck on for a while now is:
Given 5x = -2(mod 8)
find x^2(mod 8)
My attempt at a solution:
5x = -2(mod 8)'
25x^2 = 4 (mod 8)
x^2 = 4 (mod 8), as 25 = 4 (mod 8)
The answer at the back says 1, and I'm not sure where I went wrong
Thanks in advance