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
1:49 minutes
Problem 18b
Textbook Question
Textbook QuestionSolve each equation in Exercises 15–34 by the square root property. 3x^2 - 1 = 47
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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 an equation is in the form of x^2 = k, then the solutions for x can be found by taking the square root of k. This property allows us to isolate the variable by applying the square root to both sides of the equation, leading to two possible solutions: x = ±√k.
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Isolating the Variable
Isolating the variable involves rearranging an equation to get the variable on one side and all other terms on the opposite side. This is a crucial step in solving equations, as it simplifies the problem and allows for the application of properties like the square root property to find the solution.
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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 and a ≠ 0. In this context, the equation 3x^2 - 1 = 47 can be transformed into a standard quadratic form, allowing the use of the square root property to solve for x.
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