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
Intro to Quadratic Equations
2:23 minutes
Problem 115
Textbook Question
Textbook QuestionIn Exercises 115–122, find all values of x satisfying the given conditions. y = 2x^2 - 3x and y = 2
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Quadratic Functions
A quadratic function is a polynomial function of degree two, typically expressed in the form y = ax^2 + bx + c. In this case, the function y = 2x^2 - 3x is a quadratic function where a = 2, b = -3, and c = 0. Understanding the properties of quadratic functions, such as their parabolas' shape and vertex, is essential for solving equations involving them.
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Finding Intersections
To find the values of x that satisfy both equations, we need to determine the points of intersection between the two functions. This involves setting the two equations equal to each other (2x^2 - 3x = 2) and solving for x. The solutions represent the x-values where the graphs of the functions intersect, which is crucial for understanding their relationship.
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Solving Quadratic Equations
Solving quadratic equations can be done using various methods, including factoring, completing the square, or applying the quadratic formula. In this context, after rearranging the equation to standard form, we may use the quadratic formula x = (-b ± √(b² - 4ac)) / (2a) to find the roots. Mastery of these techniques is vital for effectively solving the given problem.
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