Algebra Examples

$\ln (\frac{8 e^{2} x^{5}}{(x^{2} + 1) \sqrt[3]{x + 2}})$

Step 1

Rewrite $\ln (\frac{8 e^{2} x^{5}}{(x^{2} + 1) \sqrt[3]{x + 2}})$ as $\ln (8 e^{2} x^{5}) - \ln ((x^{2} + 1) \sqrt[3]{x + 2})$ .

$\ln (8 e^{2} x^{5}) - \ln ((x^{2} + 1) \sqrt[3]{x + 2})$

Step 2

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

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

Step 3

Rewrite $\ln (8 e^{2} x^{5})$ as $\ln (8 e^{2}) + \ln (x^{5})$ .

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

Step 4

Rewrite $\ln (8 e^{2})$ as $\ln (8) + \ln (e^{2})$ .

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

Step 5

Expand $\ln (e^{2})$ by moving $2$ outside the logarithm.

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

Step 6

Expand $\ln (x^{5})$ by moving $5$ outside the logarithm.

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

Step 7

The natural logarithm of $e$ is $1$ .

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

Step 8

Multiply $2$ by $1$ .

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

Step 9

Rewrite $\ln ((x^{2} + 1) {(x + 2)}^{\frac{1}{3}})$ as $\ln (x^{2} + 1) + \ln ({(x + 2)}^{\frac{1}{3}})$ .

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

Step 10

Expand $\ln ({(x + 2)}^{\frac{1}{3}})$ by moving $\frac{1}{3}$ outside the logarithm.

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

Step 11

Simplify each term.

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Step 11.1

Rewrite $\ln (8)$ as $\ln (2^{3})$ .

$\ln (2^{3}) + 2 + 5 \ln (x) - (\ln (x^{2} + 1) + \frac{1}{3} \ln (x + 2))$

Step 11.2

Expand $\ln (2^{3})$ by moving $3$ outside the logarithm.

$3 \ln (2) + 2 + 5 \ln (x) - (\ln (x^{2} + 1) + \frac{1}{3} \ln (x + 2))$

Step 11.3

Combine $\frac{1}{3}$ and $\ln (x + 2)$ .

$3 \ln (2) + 2 + 5 \ln (x) - (\ln (x^{2} + 1) + \frac{\ln (x + 2)}{3})$

Step 11.4

To write $\ln (x^{2} + 1)$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$3 \ln (2) + 2 + 5 \ln (x) - (\ln (x^{2} + 1) \cdot \frac{3}{3} + \frac{\ln (x + 2)}{3})$

Step 11.5

Combine $\ln (x^{2} + 1)$ and $\frac{3}{3}$ .

$3 \ln (2) + 2 + 5 \ln (x) - (\frac{\ln (x^{2} + 1) \cdot 3}{3} + \frac{\ln (x + 2)}{3})$

Step 11.6

Combine the numerators over the common denominator.

$3 \ln (2) + 2 + 5 \ln (x) - \frac{\ln (x^{2} + 1) \cdot 3 + \ln (x + 2)}{3}$

Step 11.7

Move $3$ to the left of $\ln (x^{2} + 1)$ .

$3 \ln (2) + 2 + 5 \ln (x) - \frac{3 \ln (x^{2} + 1) + \ln (x + 2)}{3}$