Precalculus Examples

$\log (\sqrt{\frac{x^{5} + 8}{(x^{2} + 8) {(x^{4} - 3)}^{4}}})$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{\frac{x^{5} + 8}{(x^{2} + 8) {(x^{4} - 3)}^{4}}}$ as ${(\frac{x^{5} + 8}{(x^{2} + 8) {(x^{4} - 3)}^{4}})}^{\frac{1}{2}}$ .

$\log ({(\frac{x^{5} + 8}{(x^{2} + 8) {(x^{4} - 3)}^{4}})}^{\frac{1}{2}})$

Step 2

Expand $\log ({(\frac{x^{5} + 8}{(x^{2} + 8) {(x^{4} - 3)}^{4}})}^{\frac{1}{2}})$ by moving $\frac{1}{2}$ outside the logarithm.

$\frac{1}{2} \log (\frac{x^{5} + 8}{(x^{2} + 8) {(x^{4} - 3)}^{4}})$

Step 3

Rewrite $\log (\frac{x^{5} + 8}{(x^{2} + 8) {(x^{4} - 3)}^{4}})$ as $\log (x^{5} + 8) - \log ((x^{2} + 8) {(x^{4} - 3)}^{4})$ .

$\frac{1}{2} (\log (x^{5} + 8) - \log ((x^{2} + 8) {(x^{4} - 3)}^{4}))$

Step 4

Rewrite $\log ((x^{2} + 8) {(x^{4} - 3)}^{4})$ as $\log (x^{2} + 8) + \log ({(x^{4} - 3)}^{4})$ .

$\frac{1}{2} (\log (x^{5} + 8) - (\log (x^{2} + 8) + \log ({(x^{4} - 3)}^{4})))$

Step 5

Expand $\log ({(x^{4} - 3)}^{4})$ by moving $4$ outside the logarithm.

$\frac{1}{2} (\log (x^{5} + 8) - (\log (x^{2} + 8) + 4 \log (x^{4} - 3)))$

Step 6

Simplify each term.

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Step 6.1

Apply the distributive property.

$\frac{1}{2} (\log (x^{5} + 8) - \log (x^{2} + 8) - (4 \log (x^{4} - 3)))$

Step 6.2

Multiply $4$ by $- 1$ .

$\frac{1}{2} (\log (x^{5} + 8) - \log (x^{2} + 8) - 4 \log (x^{4} - 3))$

Step 7

Apply the distributive property.

$\frac{1}{2} \log (x^{5} + 8) + \frac{1}{2} (- \log (x^{2} + 8)) + \frac{1}{2} (- 4 \log (x^{4} - 3))$

Step 8

Simplify.

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Step 8.1

Combine $\frac{1}{2}$ and $\log (x^{5} + 8)$ .

$\frac{\log (x^{5} + 8)}{2} + \frac{1}{2} (- \log (x^{2} + 8)) + \frac{1}{2} (- 4 \log (x^{4} - 3))$

Step 8.2

Combine $\frac{1}{2}$ and $\log (x^{2} + 8)$ .

$\frac{\log (x^{5} + 8)}{2} - \frac{\log (x^{2} + 8)}{2} + \frac{1}{2} (- 4 \log (x^{4} - 3))$

Step 8.3

Cancel the common factor of $2$ .

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Step 8.3.1

Factor $2$ out of $- 4 \log (x^{4} - 3)$ .

$\frac{\log (x^{5} + 8)}{2} - \frac{\log (x^{2} + 8)}{2} + \frac{1}{2} (2 (- 2 \log (x^{4} - 3)))$

Step 8.3.2

Cancel the common factor.

$\frac{\log (x^{5} + 8)}{2} - \frac{\log (x^{2} + 8)}{2} + \frac{1}{2} (2 (- 2 \log (x^{4} - 3)))$

Step 8.3.3

Rewrite the expression.

$\frac{\log (x^{5} + 8)}{2} - \frac{\log (x^{2} + 8)}{2} - 2 \log (x^{4} - 3)$

Step 9

Combine the numerators over the common denominator.

$\frac{\log (x^{5} + 8) - \log (x^{2} + 8)}{2} - 2 \log (x^{4} - 3)$

Step 10

To write $- 2 \log (x^{4} - 3)$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$\frac{\log (x^{5} + 8) - \log (x^{2} + 8)}{2} - 2 \log (x^{4} - 3) \cdot \frac{2}{2}$

Step 11

Combine $- 2 \log (x^{4} - 3)$ and $\frac{2}{2}$ .

$\frac{\log (x^{5} + 8) - \log (x^{2} + 8)}{2} + \frac{- 2 \log (x^{4} - 3) \cdot 2}{2}$

Step 12

Combine the numerators over the common denominator.

$\frac{\log (x^{5} + 8) - \log (x^{2} + 8) - 2 \log (x^{4} - 3) \cdot 2}{2}$

Step 13

Multiply $2$ by $- 2$ .

$\frac{\log (x^{5} + 8) - \log (x^{2} + 8) - 4 \log (x^{4} - 3)}{2}$