https://file.aiquickdraw.com/mathbot/file/1726017492163pzhc15gb.jpg

The expression you've provided in the image is:

\[
(-9a^2b) - (-8a^2b)
\]

We can simplify this step-by-step:

1. First, distribute the negative sign over the second term:
   \[
   -(-8a^2b) = +8a^2b
   \]
   Now the expression becomes:
   \[
   -9a^2b + 8a^2b
   \]

2. Combine the like terms:
   \[
   (-9 + 8)a^2b = -1a^2b
   \]

Thus, the simplified expression is:
\[
-a^2b
\]

Would you like further details or have any other questions?

Here are some related questions to deepen understanding:
1. How do you combine terms with different coefficients but the same variables?
2. What happens if you had powers other than 2 in the expression?
3. How would the expression change if the variables had different exponents?
4. Can you factor a common term out of a similar expression?
5. How do we approach simplification when there are multiple variables?

**Tip:** Always distribute any negative signs or coefficients carefully before combining like terms.

Learn how to simplify the algebraic expression (-9a²b) - (-8a²b) by applying the distributive property and combining like terms. This problem involves key algebraic concepts, including simplification and combining coefficients. Suitable for students in Grades 7-9.

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