2x/(x^3 + 1)(x^2 - 1) divide into fraction

To divide the expression \( \frac{2x}{(x^3 + 1)(x^2 - 1)} \) into partial fractions, we first need to factor the denominator. Let's break it down step by step.

### Step 1: Factor the Denominator
The denominator is \( (x^3 + 1)(x^2 - 1) \).

1. **Factor \( x^3 + 1 \):**
   \[
   x^3 + 1 = (x + 1)(x^2 - x + 1)
   \]
2. **Factor \( x^2 - 1 \):**
   \[
   x^2 - 1 = (x - 1)(x + 1)
   \]

Now, the expression becomes:
\[
\frac{2x}{(x + 1)(x^2 - x + 1)(x - 1)(x + 1)}
\]

Since \( (x + 1) \) appears twice, we simplify it to:
\[
\frac{2x}{(x + 1)^2(x^2 - x + 1)(x - 1)}
\]

### Step 2: Set Up the Partial Fractions
We want to express \( \frac{2x}{(x + 1)^2(x^2 - x + 1)(x - 1)} \) as a sum of partial fractions. The general form would be:
\[
\frac{2x}{(x + 1)^2(x^2 - x + 1)(x - 1)} = \frac{A}{x + 1} + \frac{B}{(x + 1)^2} + \frac{C}{x^2 - x + 1} + \frac{D}{x - 1}
\]

### Step 3: Combine and Solve for Constants
Multiply through by the common denominator to get rid of the fractions:
\[
2x = A(x + 1)(x^2 - x + 1)(x - 1) + B(x^2 - x + 1)(x - 1) + C(x + 1)^2(x - 1) + D(x + 1)^2(x^2 - x + 1)
\]
Expand and collect like terms to solve for \( A \), \( B \), \( C \), and \( D \).

### Final Result
After solving, you will have the partial fraction decomposition, which divides the original fraction into simpler fractions.

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Would you like to proceed with the detailed steps for solving the coefficients \( A \), \( B \), \( C \), and \( D \)? Or do you have any specific part you'd like more information on?

### Related Questions:
1. How do you factor complex polynomials like \( x^3 + 1 \)?
2. What are the typical steps to solve partial fractions?
3. Can partial fraction decomposition be applied to improper fractions?
4. How do partial fractions apply in integral calculus?
5. What is the difference between simple and repeated linear factors in partial fractions?

### Tip:
Partial fraction decomposition is especially useful in integration, making complex rational expressions easier to handle.

Learn how to divide the expression 2x/(x^3 + 1)(x^2 - 1) into partial fractions with a detailed step-by-step solution. This problem involves polynomial factorization and partial fraction decomposition, suitable for advanced high school and college students.

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