Responder
Here are the simplified forms of the given expressions:
1. **a)**
\[
\frac{\alpha^{2} - 2 \alpha}{4 a^{3} - 8 a^{2}} = \frac{\alpha(\alpha - 2)}{4a^{2}(a - 2)}
\]
- If \(\alpha = a\):
\[
\frac{1}{4a}
\]
2. **ק)**
\[
\frac{x^{2} y + 2 y^{2}}{x^{3} + 2 x y} = \frac{y}{x}
\]
3. **ү)**
\[
\frac{2 \beta^{2} + 6 \alpha \beta}{12 \alpha^{2} \beta^{2} + 4 \alpha \beta^{3}} = \frac{1}{2\alpha\beta}
\]
4. **б)**
\[
\frac{\alpha^{2} - 4 \beta^{2}}{\alpha^{2} - 2 \alpha \beta} = 1 + \frac{2\beta}{\alpha} \quad \text{or} \quad \frac{\alpha + 2\beta}{\alpha}
\]
These are the simplified forms of the algebraic expressions provided.
Solución
Certainly! Let's simplify each of the given algebraic expressions step by step.
---
### **a) \( \frac{\alpha^{2} - 2 \alpha}{4 a^{3} - 8 a^{2}} \)**
**Step 1: Factor both numerator and denominator.**
- **Numerator:**
\( \alpha^{2} - 2\alpha = \alpha(\alpha - 2) \)
- **Denominator:**
\( 4a^{3} - 8a^{2} = 4a^{2}(a - 2) \)
**Step 2: Write the expression with factored terms.**
\[
\frac{\alpha(\alpha - 2)}{4a^{2}(a - 2)}
\]
**Step 3: Simplify by canceling common factors.**
- If **\(\alpha\)** and **\(a\)** are **independent variables**, there are no common factors to cancel.
**Simplified Form:**
\[
\frac{\alpha(\alpha - 2)}{4a^{2}(a - 2)}
\]
- If **\(\alpha = a\)**, then:
\[
\frac{a(a - 2)}{4a^{2}(a - 2)} = \frac{1}{4a}
\]
(Assuming \(a \neq 2\) and \(a \neq 0\))
---
### **ק) \( \frac{x^{2} y + 2 y^{2}}{x^{3} + 2 x y} \)**
**Step 1: Factor both numerator and denominator.**
- **Numerator:**
\( x^{2} y + 2 y^{2} = y(x^{2} + 2y) \)
- **Denominator:**
\( x^{3} + 2x y = x(x^{2} + 2y) \)
**Step 2: Write the expression with factored terms.**
\[
\frac{y(x^{2} + 2y)}{x(x^{2} + 2y)}
\]
**Step 3: Simplify by canceling the common factor \((x^{2} + 2y)\).**
\[
\frac{y}{x} \quad \text{(provided that } x^{2} + 2y \neq 0\text{)}
\]
---
### **ү) \( \frac{2 \beta^{2} + 6 \alpha \beta}{12 \alpha^{2} \beta^{2} + 4 \alpha \beta^{3}} \)**
**Step 1: Factor both numerator and denominator.**
- **Numerator:**
\( 2\beta^{2} + 6\alpha\beta = 2\beta(\beta + 3\alpha) \)
- **Denominator:**
\( 12\alpha^{2}\beta^{2} + 4\alpha\beta^{3} = 4\alpha\beta^{2}(3\alpha + \beta) \)
**Step 2: Write the expression with factored terms.**
\[
\frac{2\beta(\beta + 3\alpha)}{4\alpha\beta^{2}(3\alpha + \beta)}
\]
**Step 3: Simplify by canceling common factors.**
- Note that \((\beta + 3\alpha) = (3\alpha + \beta)\)
\[
\frac{2\beta}{4\alpha\beta^{2}} = \frac{2}{4\alpha\beta} = \frac{1}{2\alpha\beta}
\]
**Simplified Form:**
\[
\frac{1}{2\alpha\beta}
\]
---
### **б) \( \frac{\alpha^{2} - 4 \beta^{2}}{\alpha^{2} - 2 \alpha \beta} \)**
**Step 1: Factor both numerator and denominator.**
- **Numerator:**
\( \alpha^{2} - 4\beta^{2} = (\alpha - 2\beta)(\alpha + 2\beta) \)
- **Denominator:**
\( \alpha^{2} - 2\alpha\beta = \alpha(\alpha - 2\beta) \)
**Step 2: Write the expression with factored terms.**
\[
\frac{(\alpha - 2\beta)(\alpha + 2\beta)}{\alpha(\alpha - 2\beta)}
\]
**Step 3: Simplify by canceling the common factor \((\alpha - 2\beta)\).**
\[
\frac{\alpha + 2\beta}{\alpha} = 1 + \frac{2\beta}{\alpha} \quad \text{(provided that } \alpha \neq 0 \text{ and } \alpha \neq 2\beta\text{)}
\]
**Simplified Form:**
\[
1 + \frac{2\beta}{\alpha} \quad \text{or} \quad \frac{\alpha + 2\beta}{\alpha}
\]
---
**Summary of Simplified Expressions:**
1. **a)**
\[
\frac{\alpha^{2} - 2 \alpha}{4 a^{3} - 8 a^{2}} = \frac{\alpha(\alpha - 2)}{4a^{2}(a - 2)} \quad \text{(if } \alpha \neq 2 \text{ and } a \neq 2\text{)}
\]
- If \(\alpha = a\):
\[
\frac{1}{4a}
\]
2. **ק)**
\[
\frac{x^{2} y + 2 y^{2}}{x^{3} + 2 x y} = \frac{y}{x} \quad \text{(provided } x^{2} + 2y \neq 0\text{)}
\]
3. **ү)**
\[
\frac{2 \beta^{2} + 6 \alpha \beta}{12 \alpha^{2} \beta^{2} + 4 \alpha \beta^{3}} = \frac{1}{2\alpha\beta}
\]
4. **б)**
\[
\frac{\alpha^{2} - 4 \beta^{2}}{\alpha^{2} - 2 \alpha \beta} = 1 + \frac{2\beta}{\alpha} \quad \text{or} \quad \frac{\alpha + 2\beta}{\alpha}
\]
Feel free to ask if you need further clarification on any of these steps!
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