Simplify.

To simplify the expression , we first distribute the negative sign across the second set of parentheses. This gives us:

.

Now, we combine like terms:

Putting it all together, we arrive at the simplified expression:

.

So, the correct answer is .

Now for additional relevant knowledge:

Simplifying expressions is like tidying up your room! You want to gather all the like items together— your shoes, your books, your toys—just like you gather the coefficients of , , and the numbers in algebra. A clean room makes it easier to find what you need, just like a simplified expression makes calculations easier.

When tackling polynomial expressions, a common mistake is forgetting to distribute the subtraction properly. Always double-check that you’ve accounted for every term, as missing a negative sign can lead you to the wrong answer. It’s like trying to make a sandwich without remembering to include the bread!