1. **State the problem:** Solve the equation $$4 + \log\left(\frac{x}{4}\right) = \log(x^2)$$ for $x$.
2. **Recall logarithm properties:**
- $\log(a) + \log(b) = \log(ab)$
- $\log(a^b) = b\log(a)$
- The equation involves logarithms with the same base (assumed base 10).
3. **Isolate logarithmic terms:**
Rewrite the equation as
$$4 + \log\left(\frac{x}{4}\right) = \log(x^2)$$
4. **Express the constant 4 as a logarithm:**
Since $4 = \log(10^4)$, rewrite:
$$\log(10^4) + \log\left(\frac{x}{4}\right) = \log(x^2)$$
5. **Combine the left side logarithms:**
$$\log\left(10^4 \times \frac{x}{4}\right) = \log(x^2)$$
6. **Simplify inside the logarithm:**
$$\log\left(\frac{10^4 x}{4}\right) = \log(x^2)$$
7. **Since $\log(a) = \log(b)$ implies $a = b$, set arguments equal:**
$$\frac{10^4 x}{4} = x^2$$
8. **Multiply both sides by 4 to clear denominator:**
$$10^4 x = 4 x^2$$
9. **Rewrite and simplify:**
$$10^4 x - 4 x^2 = 0$$
10. **Factor out $x$:**
$$x(10^4 - 4 x) = 0$$
11. **Set each factor equal to zero:**
- $x = 0$ (not valid since $\log(0)$ is undefined)
- $10^4 - 4 x = 0$
12. **Solve for $x$:**
$$4 x = 10^4$$
$$x = \frac{10^4}{4}$$
13. **Calculate the value:**
$$x = \frac{10000}{4} = 2500$$
14. **Check domain:**
$x=2500 > 0$, valid for logarithms.
**Final answer:**
$$\boxed{2500}$$
Logarithmic Equation 98B777
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