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
Choosing a Method to Solve Quadratics
5:05 minutes
Problem 71b
Textbook Question
Textbook QuestionSolve each equation. √x+2-x = 2
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Square Roots
Square roots are the values that, when multiplied by themselves, yield the original number. In the equation √x, the square root function is applied to x, which means we are looking for a number that, when squared, equals x. Understanding how to manipulate square roots is essential for solving equations involving them.
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Isolating Variables
Isolating variables is a fundamental algebraic technique used to solve equations. This involves rearranging the equation to get the variable of interest on one side and all other terms on the opposite side. Mastering this concept allows students to simplify complex equations and find the value of the unknown variable.
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05:28
Equations with Two Variables
Squaring Both Sides
Squaring both sides of an equation is a method used to eliminate square roots. When both sides of an equation are squared, it can simplify the equation, making it easier to solve. However, it is important to check for extraneous solutions, as squaring can introduce solutions that do not satisfy the original equation.
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