Chapter 2: Problem 68
Multiply. $$ \frac{1}{2}(4 b-8) $$
Short Answer
Expert verified
The product is \( 2b - 4 \).
Step by step solution
01
Identify Terms in the Expression
The expression to multiply is \( \frac{1}{2}(4b - 8) \). Identify that \( \frac{1}{2} \) is a multiplicative factor that needs to be distributed across the terms inside the parentheses \( (4b - 8) \).
02
Distribute \( \frac{1}{2} \) to Each Term
Distribute \( \frac{1}{2} \) to each term inside the parentheses: \((4b - 8)\). This means multiplying \( \frac{1}{2} \) with \( 4b \) and with \( -8 \).
03
Multiply Each Term by \( \frac{1}{2} \)
Calculate \( \frac{1}{2} \times 4b \) and \( \frac{1}{2} \times -8 \). This gives \( 2b \) (since \( \frac{1}{2} \times 4 = 2 \)) and \( -4 \) (since \( \frac{1}{2} \times -8 = -4 \)).
04
Write the Result
Combine the products from Step 3 to obtain the result: \( 2b - 4 \).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Distributive Property
The distributive property is a fundamental concept in algebra that allows us to simplify expressions and equations by distributing a single term over others in a parenthesis. It specifically involves multiplying a single term, known as the 'multiplicand,' by each term separately within a set of parentheses.
The distributive property helps to simplify calculations and is expressed mathematically as follows:\( a(b + c) = ab + ac \)
This means if you have an expression like \( \rac{1}{2}(4b - 8) \), you distribute the multiplicative factor \( \rac{1}{2} \) to each of the terms in the parentheses \((4b\) and \(-8)\).
The steps are simple:
The distributive property helps to simplify calculations and is expressed mathematically as follows:\( a(b + c) = ab + ac \)
This means if you have an expression like \( \rac{1}{2}(4b - 8) \), you distribute the multiplicative factor \( \rac{1}{2} \) to each of the terms in the parentheses \((4b\) and \(-8)\).
The steps are simple:
- Multiply the term outside the parentheses by each inside term.
- Add or subtract the results as the original signs indicate.
Multiplicative Factor
A multiplicative factor is a number that is used to multiply each of the terms inside an expression. In the expression \(\frac{1}{2}(4b - 8)\), the \(\frac{1}{2}\) is the multiplicative factor. Its role is to multiply each term within the parentheses to help simplify the expression.
Here's how it works:
Here's how it works:
- The multiplicative factor is first identified; here, it's \(\frac{1}{2}\).
- Each term in the parentheses is multiplied by this factor.
- The results are then combined to form a simplified expression.
Terms in an Expression
Terms in an algebraic expression are the building blocks that are combined through mathematical operations like addition, subtraction, multiplication, etc. Each term is a product of numbers and/or variables. For example, in the expression \(4b - 8\), "\(4b\)" and "\(-8\)" are both distinct terms.
Understanding terms is crucial because:
Understanding terms is crucial because:
- Each term can be identified individually to apply operations like distribution.
- Terms include coefficients and variables - here, \(4\) is the coefficient of \(b\), and \(-8\) is a constant term.
- This helps in combining like terms or applying the distributive property effectively.