1. **State the problem:** Solve the equation $\log_3(x-2) + 2\log_9(x+3) = \log_3 14$ for $x$.
2. **Recall the properties of logarithms:**
- Change of base: $\log_9 a = \frac{\log_3 a}{\log_3 9} = \frac{\log_3 a}{2}$ since $9 = 3^2$.
- Power rule: $a \log_b c = \log_b c^a$.
3. **Rewrite the equation using base 3 logs:**
$$\log_3(x-2) + 2 \cdot \log_9(x+3) = \log_3(x-2) + 2 \cdot \frac{\log_3(x+3)}{2} = \log_3(x-2) + \log_3(x+3)$$
4. **Combine the logarithms:**
$$\log_3(x-2) + \log_3(x+3) = \log_3[(x-2)(x+3)]$$
5. **Set equal to the right side:**
$$\log_3[(x-2)(x+3)] = \log_3 14$$
6. **Since $\log_3 A = \log_3 B$, then $A = B$ (domain permitting):**
$$(x-2)(x+3) = 14$$
7. **Expand and simplify:**
$$x^2 + 3x - 2x - 6 = 14$$
$$x^2 + x - 6 = 14$$
$$x^2 + x - 20 = 0$$
8. **Solve the quadratic equation:**
Use the quadratic formula $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$ with $a=1$, $b=1$, $c=-20$.
$$x = \frac{-1 \pm \sqrt{1^2 - 4 \cdot 1 \cdot (-20)}}{2} = \frac{-1 \pm \sqrt{1 + 80}}{2} = \frac{-1 \pm \sqrt{81}}{2} = \frac{-1 \pm 9}{2}$$
9. **Calculate the two roots:**
- $x = \frac{-1 + 9}{2} = \frac{8}{2} = 4$
- $x = \frac{-1 - 9}{2} = \frac{-10}{2} = -5$
10. **Check domain restrictions:**
- $x-2 > 0 \Rightarrow x > 2$
- $x+3 > 0 \Rightarrow x > -3$
Only $x=4$ satisfies both.
**Final answer:**
$$\boxed{4}$$
Logarithmic Equation C51504
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.