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
The Quadratic Formula
2:12 minutes
Problem 2
Textbook Question
Textbook QuestionMatch the equation in Column I with its solution(s) in Column II. x^2 = -25
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Complex Numbers
Complex numbers are numbers that have a real part and an imaginary part, expressed in the form a + bi, where 'i' is the imaginary unit defined as the square root of -1. They are essential for solving equations that do not have real solutions, such as x^2 = -25, which leads to solutions involving imaginary numbers.
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Square Roots of Negative Numbers
When taking the square root of a negative number, the result is not a real number but an imaginary number. For example, the equation x^2 = -25 implies that x = ±√(-25), which can be simplified to x = ±5i, where 'i' represents the imaginary unit. Understanding this concept is crucial for solving equations with negative results.
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Quadratic Equations
A quadratic equation is a polynomial equation of the form ax^2 + bx + c = 0, where a, b, and c are constants. The solutions to quadratic equations can be found using various methods, including factoring, completing the square, or applying the quadratic formula. In this case, recognizing that the equation x^2 = -25 is a quadratic equation helps in identifying the appropriate methods for finding its solutions.
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