Problem 56

Question

Explain how to find the partial fraction decomposition of a rational expression with a prime quadratic factor in the denominator.

Step-by-Step Solution

Verified
Answer
The partial fraction decomposition of a rational expression with a prime quadratic factor involves identifying the quadratic factor, expressing the rational expression as a sum of simpler fractions, solving a system of equations to find the numerators of the fractions, and verifying that the result matches the original expression.
1Step 1: Identify the quadratic factor in the denominator
Look at the denominator of the rational expression and find the prime quadratic factor. A prime quadratic factor is a quadratic expression that cannot be factored further.
2Step 2: Express the rational expression as an equivalent sum of fractions
The goal of partial fraction decomposition is to express the given rational expression as an equivalent sum of fractions, where each fraction has a simpler denominator. If the prime quadratic factor in the denominator is \(ax^2+bx+c\), the corresponding term in the sum of fractions will have that factor in the denominator and a linear term \(mx+n\) in the numerator.
3Step 3: Solve system of equations
To find the linear numerator term of the partial fraction, set the given rational expression equal to the sum of fractions and solve the resulting system of equations.
4Step 4: Check your answer
Add the partial fractions together and simplify to verify that the result matches the original rational expression.