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
2:43 minutes
Problem 30b
Textbook Question
Textbook QuestionSolve each equation in Exercises 15–34 by the square root property. (4x - 1)^2 = 16
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Square Root Property
The square root property states that if a quadratic equation is in the form (ax + b)^2 = c, then the solutions can be found by taking the square root of both sides. This leads to two possible equations: ax + b = √c and ax + b = -√c. This property is essential for solving equations that can be expressed as perfect squares.
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Isolating the Variable
Isolating the variable involves rearranging an equation to get the variable on one side and the constants on the other. In the context of the square root property, this means first simplifying the equation to the form (4x - 1)^2 = 16, and then applying the square root property to solve for x. This step is crucial for finding the correct solutions.
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Equations with Two Variables
Quadratic Equations
Quadratic equations are polynomial equations of the form ax^2 + bx + c = 0, where a, b, and c are constants. They can be solved using various methods, including factoring, completing the square, and using the quadratic formula. Understanding the nature of quadratic equations helps in recognizing when to apply the square root property effectively.
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