Use Choices A–D to answer each question. A. 3x2 - 17x - 6 = 0 B. (2x + 5)2 = 7 C. x2 + x = 12 D. (3x - 1)(x - 7) = 0 Only one of the equations does not require Step 1 of the method for completing the square described in this section. Which one is it? Solve it.
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 18
Textbook Question
Solve each equation using the zero-factor property. -6x2 + 7x = -10
Verified step by step guidance1
First, rewrite the equation so that one side equals zero. Start with the given equation: \(-6x^2 + 7x = -10\). Add 10 to both sides to get: \(-6x^2 + 7x + 10 = 0\).
Next, try to factor the quadratic expression \(-6x^2 + 7x + 10\). To make factoring easier, you can factor out a negative sign first: \(-(6x^2 - 7x - 10) = 0\).
Now, focus on factoring the quadratic inside the parentheses: \$6x^2 - 7x - 10\(. Look for two numbers that multiply to \)6 \times (-10) = -60\( and add to \)-7$.
Once you find those two numbers, use them to split the middle term and factor by grouping. This will give you a product of two binomials.
After factoring, apply the zero-factor property which states that if \(AB = 0\), then either \(A = 0\) or \(B = 0\). Set each factor equal to zero and solve for \(x\).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Zero-Factor Property
The zero-factor property states that if the product of two factors equals zero, then at least one of the factors must be zero. This property is essential for solving polynomial equations by factoring, as it allows us to set each factor equal to zero and solve for the variable.
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Rearranging Equations to Standard Form
Before applying the zero-factor property, the equation must be rewritten in standard form, meaning all terms are on one side and the equation equals zero. This step is crucial because factoring and applying the zero-factor property require the equation to be set to zero.
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Factoring Quadratic Expressions
Factoring involves expressing a quadratic expression as a product of two binomials or other factors. Recognizing common factoring techniques, such as factoring out the greatest common factor or using methods like grouping or the quadratic formula, is key to breaking down the equation for applying the zero-factor property.
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