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
3:45 minutes
Problem 13f
Textbook Question
Textbook QuestionSolve each equation. | x - 4/ 2| = 5
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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. It is denoted by vertical bars, such as |x|, and is always non-negative. For example, |3| = 3 and |-3| = 3. Understanding absolute value is crucial for solving equations that involve it, as it leads to two possible cases based on the definition.
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Linear Equations
Linear equations are mathematical statements that express a relationship between variables in the form of a straight line when graphed. They typically take the form ax + b = c, where a, b, and c are constants. In the context of the given equation, solving for x involves isolating the variable to find its value, which may yield multiple solutions due to the nature of absolute value.
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Case Analysis
Case analysis is a problem-solving technique used to break down complex problems into simpler, manageable parts. In the context of absolute value equations, it involves considering different scenarios based on the definition of absolute value. For the equation |x - 4/2| = 5, this means setting up two separate equations: x - 4/2 = 5 and x - 4/2 = -5, allowing for a comprehensive solution.
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