Final answer:
The provided question does not include enough details to give a specific numerical answer, but it discusses general rules for signs in multiplication, division, addition, and subtraction. To answer the question, the exact expression or equation from the first example would be needed.
Step-by-step explanation:
The information provided seems to be describing rules for the signs of results when performing arithmetic operations like addition, subtraction, multiplication, and division, as well as processes involved in handling algebraic expressions and equations. However, without the exact details of the first example that is being referred to, it's not possible to give a specific answer.
Let's review the general principles mentioned:
- Multiplication rules: Two positive numbers or two negative numbers when multiplied will result in a positive product, while multiplying numbers with opposite signs yields a negative product.
- Division rules: These are the same as multiplication rules with respect to the signs of the quotient.
- Addition and subtraction rules: When adding or subtracting numbers, the signs of the numbers play a role in determining the sign of the result. Adding two numbers with the same sign retains that sign, while adding numbers with opposite signs requires you to subtract the smaller number from the larger and take the sign of the larger number. In subtraction, changing the sign of the second number and following the rules for addition applies.
We'd also need to know the exact expression or equation to solve using these principles to provide a specific answer to the student's question about the first example.