K I have two questions this time actually,

They are very similar, but here is first one:

Prove that (a^3 - b^3) is divisible by (a - b) and find other factors.

second question is:

Prove that (a^3 - b^3) is divisible by (a + b) and find other factors.

They look similar and I believe that the factors are like going to be similar for both but not sure then again! Please if anyone knows how to find, even one then from there I can work on other one!

Also can I ask how you people got so good in Calculus. Not that I suck I just get stuck sometimes on some tricky or complex problems! Please what did you do to get better! (like keep doing questions over, or do extra work aside teachers, P.S. I am still in high school!)