1. **State the problem:** Solve the logarithmic equation $$\log(x^2 + 5) - \log 3 = 1$$.
2. **Recall the logarithm property:** The difference of logarithms is the logarithm of a quotient:
$$\log a - \log b = \log \left(\frac{a}{b}\right)$$.
3. **Apply the property:**
$$\log \left(\frac{x^2 + 5}{3}\right) = 1$$.
4. **Rewrite the logarithmic equation in exponential form:**
Since the base of the logarithm is 10 (common log),
$$\frac{x^2 + 5}{3} = 10^1 = 10$$.
5. **Solve for $x^2$:**
Multiply both sides by 3:
$$x^2 + 5 = 30$$
Subtract 5:
$$x^2 = 25$$.
6. **Find $x$:**
Take the square root of both sides:
$$x = \pm 5$$.
7. **Check for extraneous solutions:**
Substitute $x = 5$ into the original logarithmic expressions:
$$x^2 + 5 = 25 + 5 = 30 > 0$$ (valid)
Substitute $x = -5$:
$$(-5)^2 + 5 = 25 + 5 = 30 > 0$$ (valid)
Both solutions are valid.
**Final answer:**
$$x = 5 \text{ or } x = -5$$
Logarithmic Equation 4Bce7C
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