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In Exercises 1–26, solve and check each linear equation. 7x - 5 = 72
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Ch. 1 - Equations and Inequalities
Blitzer8th EditionCollege AlgebraISBN: 9780136970514
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TOC.tableOfContents
- Ch. P - Fundamental Concepts of Algebra311
- Ch. 1 - Equations and Inequalities398
- Ch. 2 - Functions and Graphs407
- Ch. 3 - Polynomial and Rational Functions306
- Ch. 4 - Exponential and Logarithmic Functions247
- Ch. 5 - Systems of Equations and Inequalities173
- Ch. 6 - Matrices and Determinants143
- Ch. 7 - Conic Sections124
- Ch. 8 - Sequences, Induction, and Probability251
Capitolo 2, Problema 3
Solve each equation in Exercises 1 - 14 by factoring.
Guida verificata passo dopo passo1
Rewrite the equation so that all terms are on one side, setting the equation equal to zero: \(x^2 - 8x + 15 = 0\).
Identify the quadratic expression to factor: \(x^2 - 8x + 15\).
Find two numbers that multiply to the constant term (15) and add up to the coefficient of the linear term (-8).
Use these two numbers to factor the quadratic into the form \((x - a)(x - b) = 0\), where \(a\) and \(b\) are the numbers found in the previous step.
Set each factor equal to zero and solve for \(x\): \(x - a = 0\) and \(x - b = 0\).
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Rearranging Equations to Standard Form
To solve quadratic equations by factoring, first rewrite the equation so that one side equals zero. This involves moving all terms to one side, resulting in a standard form ax² + bx + c = 0, which is essential for applying factoring techniques.
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Standard Form of Line Equations
Factoring Quadratic Expressions
Factoring involves expressing a quadratic polynomial as a product of two binomials. This process helps identify the roots of the equation by setting each factor equal to zero, simplifying the solution of the quadratic equation.
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06:08Solving Quadratic Equations by Factoring
Zero Product Property
The zero product property states that if the product of two factors is zero, then at least one of the factors must be zero. This principle allows us to solve quadratic equations by setting each factor equal to zero and solving for the variable.
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3:49Product, Quotient, and Power Rules of Logs
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