- a,b and c are integers such that a|b and b|c. Prove that a^2 |(b^2 +bc).

if a|b than

for some m in the integers

if b|c

for some n in the integers,

I know I need to show that if

than

for some k in integers.

really stuck from here, not such if my working is correct so far either,

any help appreciated.