Question: this is a discrete math question where you have to...
This is a discrete math question where you have to prove the following, I was wondering what the proof for these would be. Its university level maths.
SHOW THAT FOR ALL INTEGERS n THAT:
a) If d is an integer such that d | n+9, and d | n^2 + 5, then d | 86
b) If n is a multiple of 86, then n+9 and n^2+5 are coprime