an-a^2b

The expression \( an - a^2b \) can be factored. To factor this expression, you can look for common factors in both terms.

1. The first term is \( an \).
2. The second term is \( -a^2b \).

The common factor in these terms is \( a \). Factoring \( a \) out gives:

\[ an - a^2b = a(n - ab) \]

So the factored form of the expression is \( a(n - ab) \).

If you have any specific questions regarding this expression or would like to explore more, feel free to ask!