Question

In Problems 13-46, write the partial fraction decomposition of each rational expression. $\frac{4}{2 x^2-5 x-3}$

   In Problems 13-46, write the partial fraction decomposition of each rational expression.
$\frac{4}{2 x^2-5 x-3}$
Precalculus: pearson new international edition
Precalculus: pearson new international edition
Michael Sullivan 9th Edition
Chapter 11, Problem 43 ↓

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The expression is \(\frac{4}{2x^2 - 5x - 3}\). Start by finding factors of \(2x^2 - 5x - 3\). We look for two numbers whose product is \(2 \times -3 = -6\) and whose sum is \(-5\). These numbers are \(-6\) and \(1\). Thus, we can rewrite the middle term \(-5x\) as  Show more…

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In Problems 13-46, write the partial fraction decomposition of each rational expression. $\frac{4}{2 x^2-5 x-3}$
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Key Concepts

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Polynomial Factorization
Polynomial factorization is the process of rewriting a polynomial as a product of simpler polynomials. In the context of partial fraction decomposition, factoring the denominator is a crucial step because it reveals the individual factors that determine the structure of the simpler fractions.
Linear Factors
Linear factors are polynomials of degree one that result from factoring the denominator. When a denominator factors into distinct linear factors, the rational expression can be decomposed into a sum of fractions, each with a linear denominator. This simplifies the analysis and calculation, especially when integrating or solving equations.
Partial Fraction Decomposition
Partial fraction decomposition is a technique used in algebra to break down a complex rational expression into a sum of simpler fractions. This method is especially useful for integration and solving differential equations, as it simplifies the overall expression into forms that can be more easily manipulated or integrated.
Rational Expressions
Rational expressions are fractions where the numerator and the denominator are polynomials. Handling these expressions typically involves simplifying, factoring, or decomposing them, and they appear frequently in algebraic problems, calculus, and applied mathematics.

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