Evaluate the discriminant for each equation. Then use it to determine the number and type of solutions. 8x² = -2x -6
Table of contents
- 0. Review of Algebra4h 18m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations1h 43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 5m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 22m
- 10. Combinatorics & Probability1h 45m
1. Equations & Inequalities
The Square Root Property
Problem 1
Textbook Question
Match the equation in Column I with its solution(s) in Column II. x2 = 25

Verified step by step guidance1
Identify the type of equation given: \(x^2 = 25\) is a quadratic equation in the form \(x^2 = c\), where \(c\) is a positive constant.
Recall the property that if \(x^2 = c\), then \(x = \pm \sqrt{c}\). This means the solutions are both the positive and negative square roots of \(c\).
Apply this property to the equation: \(x = \pm \sqrt{25}\).
Simplify the square root: \(\sqrt{25} = 5\), so the solutions are \(x = 5\) and \(x = -5\).
Match these solutions to the options in Column II that list \(x = 5\) and \(x = -5\) as the solutions.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Solving Quadratic Equations
A quadratic equation is a polynomial equation of degree two, typically in the form ax² + bx + c = 0. Solving such equations involves finding values of x that satisfy the equation, often by factoring, using the quadratic formula, or isolating the variable when possible.
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Square Roots and Their Properties
Taking the square root of both sides of an equation like x² = 25 involves understanding that both positive and negative roots are possible. Specifically, if x² = a, then x = ±√a, meaning the solutions include both the positive and negative square roots.
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Matching Equations to Solutions
Matching equations to their solutions requires recognizing the form of the equation and applying appropriate solution methods. For x² = 25, identifying that the solutions are x = 5 and x = -5 helps correctly pair the equation with its solution set.
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