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Let's evaluate the expression:

\[
5 - (1 + 2)^2
\]

### Step-by-step solution:
1. **Evaluate inside the parentheses**:  
   \( 1 + 2 = 3 \)

2. **Square the result**:  
   \( 3^2 = 9 \)

3. **Subtract from 5**:  
   \( 5 - 9 = -4 \)

The correct answer is **A. -4**.

Would you like any further details or have any other questions?

Here are 5 related questions for practice:
1. What is the value of \( 6 - (2 + 3)^2 \)?
2. How do parentheses affect the order of operations?
3. What is the square of \( 4 + 1 \)?
4. How does the square function apply when negative numbers are involved?
5. If the expression was \( 5 + (1 + 2)^2 \), how would the result change?

**Tip**: Always remember the order of operations (PEMDAS) when solving expressions: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction.

Learn how to solve the expression 5 - (1 + 2)^2 with a detailed step-by-step solution. This math problem covers key arithmetic concepts like parentheses, exponents, and the order of operations. Suitable for students in Grades 6-8.

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