1. **State the problem:** Simplify the expression $$\log_2 6 \cdot \log_3 6 - (\log_3 3 + \log_3 2)$$.
2. **Recall logarithm properties:**
- $$\log_a a = 1$$ for any base $$a$$.
- Product rule: $$\log_a xy = \log_a x + \log_a y$$.
- Change of base formula: $$\log_a b = \frac{\log_c b}{\log_c a}$$ for any base $$c$$.
3. **Evaluate terms inside parentheses:**
- $$\log_3 3 = 1$$ because the base and argument are the same.
- $$\log_3 2$$ remains as is.
So, $$\log_3 3 + \log_3 2 = 1 + \log_3 2$$.
4. **Rewrite $$\log_2 6$$ and $$\log_3 6$$ using change of base to base 3:**
- $$\log_2 6 = \frac{\log_3 6}{\log_3 2}$$.
5. **Substitute into the original expression:**
$$\log_2 6 \cdot \log_3 6 - (1 + \log_3 2) = \frac{\log_3 6}{\log_3 2} \cdot \log_3 6 - 1 - \log_3 2$$
6. **Simplify the product:**
$$= \frac{(\log_3 6)^2}{\log_3 2} - 1 - \log_3 2$$
7. **Express $$\log_3 6$$ as $$\log_3 (2 \cdot 3) = \log_3 2 + \log_3 3 = \log_3 2 + 1$$:**
So,
$$ (\log_3 6)^2 = (\log_3 2 + 1)^2 = (\log_3 2)^2 + 2 \log_3 2 + 1 $$
8. **Substitute back:**
$$= \frac{(\log_3 2)^2 + 2 \log_3 2 + 1}{\log_3 2} - 1 - \log_3 2$$
9. **Split the fraction:**
$$= \frac{(\log_3 2)^2}{\log_3 2} + \frac{2 \log_3 2}{\log_3 2} + \frac{1}{\log_3 2} - 1 - \log_3 2$$
10. **Simplify terms:**
$$= \log_3 2 + 2 + \frac{1}{\log_3 2} - 1 - \log_3 2$$
11. **Cancel $$\log_3 2$$ and combine constants:**
$$= 2 - 1 + \frac{1}{\log_3 2} = 1 + \frac{1}{\log_3 2}$$
12. **Rewrite $$\frac{1}{\log_3 2}$$ using change of base:**
$$\frac{1}{\log_3 2} = \log_2 3$$
13. **Final simplified expression:**
$$1 + \log_2 3$$
**Answer:** $$\boxed{1 + \log_2 3}$$
Logarithm Expression 406C04
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