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
Rational Equations
4:09 minutes
Problem 18a
Textbook Question
Textbook QuestionSolve each equation. |2x + 3/ 3x - 4 | = 1
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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 measures the distance of a number from zero on the number line, regardless of direction. For any real number 'a', the absolute value is denoted as |a| and is defined as |a| = a if a ≥ 0, and |a| = -a if a < 0. In the context of equations, the absolute value can lead to two separate cases that must be solved individually.
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Equations with Absolute Values
When solving equations involving absolute values, such as |A| = B, where B is a positive number, we create two separate equations: A = B and A = -B. This approach allows us to find all possible solutions that satisfy the original equation. It is crucial to check each solution in the context of the original equation to ensure they are valid.
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Rational Expressions
A rational expression is a fraction where both the numerator and the denominator are polynomials. In the equation given, |(2x + 3)/(3x - 4)| = 1, understanding how to manipulate and simplify rational expressions is essential. This includes finding common denominators, factoring, and ensuring that the denominator does not equal zero, as this would make the expression undefined.
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