1. **State the problem:** Simplify the expression $$\frac{x^2 + 13x + 12}{x + 1} \times \frac{5x + 10}{4x^2 - 16}$$.
2. **Factor all polynomials:**
- Numerator of first fraction: $$x^2 + 13x + 12 = (x + 1)(x + 12)$$
- Denominator of first fraction: $$x + 1$$ (already factored)
- Numerator of second fraction: $$5x + 10 = 5(x + 2)$$
- Denominator of second fraction: $$4x^2 - 16 = 4(x^2 - 4) = 4(x - 2)(x + 2)$$
3. **Rewrite the expression with factors:**
$$\frac{(x + 1)(x + 12)}{x + 1} \times \frac{5(x + 2)}{4(x - 2)(x + 2)}$$
4. **Cancel common factors:**
- Cancel $$x + 1$$ from numerator and denominator:
$$\frac{\cancel{(x + 1)}(x + 12)}{\cancel{x + 1}} \times \frac{5(x + 2)}{4(x - 2)(x + 2)}$$
- Cancel $$x + 2$$ from numerator and denominator:
$$\frac{(x + 12)}{1} \times \frac{5\cancel{(x + 2)}}{4(x - 2)\cancel{(x + 2)}}$$
5. **Multiply remaining factors:**
$$\frac{(x + 12) \times 5}{4(x - 2)} = \frac{5(x + 12)}{4(x - 2)}$$
6. **Final simplified expression:**
$$\boxed{\frac{5(x + 12)}{4(x - 2)}}$$
This is the simplified form of the original expression, valid for all $$x \neq -1, -2, 2$$ to avoid division by zero.
Simplify Rational A964E5
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