-9 - (-2)

To simplify this expression, we first simplify the negative signs.

When a negative sign is in front of a number, it is equivalent to multiplying that number by -1. In this case, we have -(-2), which is the same as -1 * -2.

So, -9 - (-2) becomes -9 + 2.

Finally, we add -9 and 2 to get -7 as the answer.

Therefore, -9 - (-2) = -7.