Table of contents
- 0. Review of Algebra4h 16m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 19m
- 10. Combinatorics & Probability1h 45m
1. Equations & Inequalities
Linear Equations
2:28 minutes
Problem 111
Textbook Question
Textbook QuestionSolve each equation or inequality. |5x-1| = |2x+3|
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Absolute Value
Absolute value represents the distance of a number from zero on the number line, regardless of direction. For any real number 'a', the absolute value is defined as |a| = a if a ≥ 0, and |a| = -a if a < 0. In the context of equations, it indicates that the expressions inside the absolute value can yield two possible equations, one for each case of the sign.
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Equations with Absolute Values
When solving equations involving absolute values, such as |A| = |B|, it is essential to consider both scenarios: A = B and A = -B. This leads to two separate equations that must be solved individually. The solutions from both equations must then be checked to ensure they satisfy the original equation.
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Inequalities and Solution Sets
Inequalities express a relationship where one side is not necessarily equal to the other, often represented with symbols like <, >, ≤, or ≥. When solving inequalities, the solution set may include a range of values rather than discrete points. Understanding how to represent and interpret these solution sets is crucial for accurately conveying the results of an inequality.
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