Precalculus Examples

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

Step 1

Simplify each term.

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Step 1.1

Simplify $4 \ln (x + 3)$ by moving $4$ inside the logarithm.

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

Step 1.2

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

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Step 1.2.1

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

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

Step 1.2.2

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

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

Step 1.3

Simplify $4 \ln (x - 3)$ by moving $4$ inside the logarithm.

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

Step 1.4

Simplify $- 4 \ln (x + 5)$ by moving $4$ inside the logarithm.

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

Step 2

Use the product property of logarithms, $\log_{b} (x) + \log_{b} (y) = \log_{b} (x y)$ .

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

Step 3

Use the quotient property of logarithms, $\log_{b} (x) - \log_{b} (y) = \log_{b} (\frac{x}{y})$ .

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

Step 4

Use the product property of logarithms, $\log_{b} (x) + \log_{b} (y) = \log_{b} (x y)$ .

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

Step 5

Use the quotient property of logarithms, $\log_{b} (x) - \log_{b} (y) = \log_{b} (\frac{x}{y})$ .

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

Step 6

Combine $\frac{{(x + 3)}^{4} (5 x + 2)}{{(x^{3} + 3)}^{\frac{1}{2}}}$ and ${(x - 3)}^{4}$ .

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

Step 7

Multiply the numerator by the reciprocal of the denominator.

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

Step 8

Combine.

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

Step 9

Multiply ${(x + 3)}^{4}$ by $1$ .

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