To expand the given expression $8m(m - 2)$:

1. Distribute $8m$ to each term inside the parentheses:

$8m \cdot m - 8m \cdot 2$

2. Simplify each term:

$8m^2 - 16m$

Thus, the expanded expression is:

$8m^2 - 16m$

Would you like a more detailed explanation or have any specific questions?

Here are some related questions:

1. What are the steps to simplify similar expressions?
2. How do you factorize expressions like $8m^2 - 16m$?
3. What are the applications of polynomial expansion in mathematics?
4. Can you expand and simplify more complex expressions involving multiple terms?
5. What happens when you include powers of $m$ in such expansions?

Tip: Always distribute every term in the parentheses carefully to avoid missing any multiplication.