Partial Fraction Calculator

This calculator helps you break down rational expressions into simpler fractions—called partial fractions—making integration and algebra easier. It's a must-have tool for students, engineers, and anyone tackling calculus problems.

Last Updated: April 13, 2025

What Are Partial Fractions?

Partial fractions are a way to rewrite a complex rational expression (a fraction with polynomials) as a sum of simpler fractions. This technique is especially useful in integral calculus, control theory, and solving differential equations.

Why Use Partial Fraction Decomposition?

  • 🧩 Simplifies complex algebraic expressions
  • 📐 Makes integration easier and more manageable
  • 🔍 Essential for solving differential equations
  • 📊 Widely used in engineering and applied math

How to Use the Partial Fraction Calculator

  1. Enter the rational expression (e.g., (x^2 + 3x + 2)/(x^2 - 1))
  2. Click the "Calculate" button
  3. View the decomposed result in partial fraction form
  4. Check the step-by-step breakdown (if available)

Partial Fraction Examples

  • (x + 5)/(x^2 - x - 6)1/(x - 3) + 2/(x + 2)
  • 2x/(x^2 + x)2/x - 2/(x + 1)
  • (3x + 1)/(x^2 + 3x + 2)1/(x + 1) + 2/(x + 2)

Applications

  • 📘 Calculus – Integral simplification
  • 🔁 Differential equations – Laplace transform inversions
  • ⚙️ Control systems – Transfer function simplification
  • 🧠 Algebra – Rational expression manipulation

FAQ

What is a partial fraction?

A partial fraction is one of the simpler rational expressions that, when added together, recreate the original complex fraction. Decomposing into partial fractions makes integration and solving equations more manageable.

How do you compute partial fractions?

To decompose a rational expression, factor the denominator and express the original fraction as a sum of simpler terms. Then solve for unknowns using algebraic methods like substitution or system of equations.

Why is partial fraction decomposition useful?

It transforms complicated algebraic fractions into simpler parts that are easier to integrate, differentiate, or analyze in engineering problems.

Can all rational functions be decomposed?

Most rational expressions with proper form (numerator degree less than denominator) can be decomposed. Improper fractions must first be simplified using polynomial division.

Break down complex expressions—fast!

Try our free Partial Fraction Calculator now and simplify your rational expressions with ease.

Try the Calculator