Chapter 11: Problem 21
Specify each term. $$-6 a-5 b$$
Short Answer
Expert verified
Terms: \(-6a\) and \(-5b\).
Step by step solution
01
Identify Terms
Terms in an algebraic expression are individual components separated by plus (+) or minus (-) signs. Here, the expression is \(-6a - 5b\).
02
Specify Each Term
In the expression \(-6a - 5b\), there are two terms. The first term is \(-6a\) and the second term is \(-5b\). Each term consists of a constant (coefficient) and a variable.
03
Breakdown of the First Term
The first term \(-6a\) consists of a coefficient \(-6\) and a variable \(a\). This means \(-6a\) stands for \(-6\) times \(a\).
04
Breakdown of the Second Term
The second term \(-5b\) consists of a coefficient \(-5\) and a variable \(b\). This means \(-5b\) stands for \(-5\) times \(b\).
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Coefficients
A coefficient is a number that multiplies a variable within an algebraic term. In the expression \(-6a - 5b\), the coefficients are \(-6\) and \(-5\). The sign of the coefficient indicates whether the term is positive or negative. Here are the main points to remember about coefficients:
- They determine the magnitude of the term. For instance, in \(-6a\), the coefficient \(-6\) shows how many times the variable \(a\) is counted.
- The coefficient can be positive or negative. If it is negative, as in \(-6\), it means that the term is subtracted.
- The absence of a written number in a term indicates a coefficient of 1. For example, the term \(x\) is essentially \(1x\).
Variables
Variables are symbols used to represent unknown or changeable values in algebraic expressions. In the expression \(-6a - 5b\), the variables are \(a\) and \(b\). These symbols stand in for numbers, and here's more about them:
- Variables can take various values. Their exact value depends on the context or any given condition.
- They are crucial for creating formulas and expressions, allowing flexible usage in different scenarios.
- Variables are typically represented by letters such as \(x, y, a, b\), etc.
Terms in Algebra
In algebra, a term is a single mathematical expression. It can be a number, a variable, or a combination of numbers and variables, often involving coefficients and powers. Let's look into the expression \(-6a - 5b\), which includes two terms: \(-6a\) and \(-5b\). Here’s what you should know:
- Terms are the building blocks of algebraic expressions. They are separated by plus (+) or minus (−) signs.
- Each term consists of a coefficient and a variable factor, possibly raised to an exponent.
- The degree of a term is the exponent of the variable. If no exponent is shown, the variable is to the power of one.