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Chapter 2: Problem 116

Describe ways in which solving a linear inequality is different from solving a linear equation.

Short Answer

Expert verified
The three main differences between solving linear inequalities and linear equations are: 1. The use of inequality symbols in inequalities as opposed to an equality symbol in equations. 2. Solution presentation - where inequalities solutions are displayed as ranges, and equations as specific points. 3. Handling multiplication and division by negative numbers, which requires flipping the inequality symbol in inequalities.

Step by step solution

01

Difference 1: Symbols

When solving a linear equation, one looks for an equal balance between both sides of the equation, denoted by the use of the equality symbol \(=\). Conversely, in a linear inequality, one looks for an unequal relationship between both sides, marking this with an inequality symbol such as \(<\), \(>\), \(\leq\), or \(\geq\).
02

Difference 2: Solution Representation

The solution of a linear equation is a specific value or set of values, while the solution of a linear inequality is often a range of values. When representing these solutions, a linear equation's solution is usually represented as a point on a number line or a coordinate on a graph, while a linear inequality's solution is shown as a range or section on a number line or an area on a graph.
03

Difference 3: Handling Multiplication and Division by Negative Numbers

The process of solving both linear equations and inequalities involves manipulating the equations to solve for the desired variable. As part of this manipulation, multiplying or dividing might be necessary. When dealing with a linear equation, multiplying or dividing both sides by a negative number doesn't affect the equation. But in a linear inequality, if you multiply or divide by a negative number, the inequality symbol must be flipped to maintain the relationship between both sides.

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Most popular questions from this chapter

Use the addition property of inequality to solve each inequality and graph the solution set on a number line. \(x-5 \geq 2\)

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