Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN: 9780134463216
Author: Robert F. Blitzer
Publisher: PEARSON
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### Multiplying Rational Expressions

To multiply rational expressions, we use the rule for multiplying rational expressions by factoring the numerators and denominators to remove any common factors. Here’s a detailed example to demonstrate this process.

#### Example: Multiply 

\[ \frac{25a^3}{11b} \cdot \frac{b}{5a} \]

To find the product, we use the following steps:

1. **Multiplying the Numerators and Denominators:**

   \[ \frac{25a^3}{11b} \cdot \frac{b}{5a} = \frac{25a^3 \cdot b}{11b \cdot 5a} \]

2. **Factoring Common Factors:**

   It is apparent that both the numerator and denominator have common factors such as 5, \(a\), and \(b\). Breaking them down:

   \[ \frac{25a^3 \cdot b}{11b \cdot 5a} = \frac{5 \cdot 5 \cdot a \cdot a \cdot a \cdot b}{11 \cdot b \cdot 5 \cdot a} \]

3. **Simplifying the Expression:**

   Next, we simplify by replacing common factors:

   \[ \frac{5 \cdot 5 \cdot a \cdot a \cdot a \cdot b}{11 \cdot b \cdot 5 \cdot a} = \frac{1 \cdot 5 \cdot 1 \cdot a \cdot a \cdot 1}{11 \cdot 1 \cdot 1 \cdot a} \]

   \[ 5 = \frac{5a^2}{11} \]

4. **Final Result:**

   \[ \frac{5a^2}{11} \]

Thus, the simplified form of the product is: 

\[ \frac{5a^2}{11} \]

### Practice Problem: Multiply

\[ \frac{x^{11}}{10y} \cdot \frac{15y}{11x^7} \]

Follow the same steps as above to simplify the expression.

---

### Explanation of the Provided Content:

- **Title and Introduction:**

  The expression starts with explaining the goal and process of multiplying
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Transcribed Image Text:### Multiplying Rational Expressions To multiply rational expressions, we use the rule for multiplying rational expressions by factoring the numerators and denominators to remove any common factors. Here’s a detailed example to demonstrate this process. #### Example: Multiply \[ \frac{25a^3}{11b} \cdot \frac{b}{5a} \] To find the product, we use the following steps: 1. **Multiplying the Numerators and Denominators:** \[ \frac{25a^3}{11b} \cdot \frac{b}{5a} = \frac{25a^3 \cdot b}{11b \cdot 5a} \] 2. **Factoring Common Factors:** It is apparent that both the numerator and denominator have common factors such as 5, \(a\), and \(b\). Breaking them down: \[ \frac{25a^3 \cdot b}{11b \cdot 5a} = \frac{5 \cdot 5 \cdot a \cdot a \cdot a \cdot b}{11 \cdot b \cdot 5 \cdot a} \] 3. **Simplifying the Expression:** Next, we simplify by replacing common factors: \[ \frac{5 \cdot 5 \cdot a \cdot a \cdot a \cdot b}{11 \cdot b \cdot 5 \cdot a} = \frac{1 \cdot 5 \cdot 1 \cdot a \cdot a \cdot 1}{11 \cdot 1 \cdot 1 \cdot a} \] \[ 5 = \frac{5a^2}{11} \] 4. **Final Result:** \[ \frac{5a^2}{11} \] Thus, the simplified form of the product is: \[ \frac{5a^2}{11} \] ### Practice Problem: Multiply \[ \frac{x^{11}}{10y} \cdot \frac{15y}{11x^7} \] Follow the same steps as above to simplify the expression. --- ### Explanation of the Provided Content: - **Title and Introduction:** The expression starts with explaining the goal and process of multiplying
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