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 Inequalities
6:10 minutes
Problem 40b
Textbook Question
Textbook QuestionSolve each quadratic inequality. Give the solution set in interval notation. See Exam-ples 5 and 6. x^2-7x+10<0
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Quadratic Inequalities
Quadratic inequalities are expressions that involve a quadratic polynomial set to be less than, greater than, less than or equal to, or greater than or equal to zero. To solve these inequalities, one typically finds the roots of the corresponding quadratic equation and then tests intervals to determine where the inequality holds true.
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Interval Notation
Interval notation is a mathematical notation used to represent a range of values. It uses parentheses and brackets to indicate whether endpoints are included (closed intervals) or excluded (open intervals). For example, (a, b) represents all numbers between a and b, not including a and b, while [a, b] includes both endpoints.
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Interval Notation
Factoring Quadratics
Factoring quadratics involves rewriting a quadratic expression as a product of its linear factors. For the inequality x^2 - 7x + 10 < 0, factoring helps identify the roots of the equation x^2 - 7x + 10 = 0, which are critical points that divide the number line into intervals for testing the inequality.
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