Precalculus Examples

$\frac{\log_{5} (25 x^{2} {(y + 1)}^{3})}{\log_{5} ({(2 z - 1)}^{3} \sqrt[5]{{(x - 4)}^{3}})}$

Step 1

Reorder factors in $\frac{\log_{5} (25 x^{2} {(y + 1)}^{3})}{\log_{5} ({(2 z - 1)}^{3} \sqrt[5]{{(x - 4)}^{3}})}$ .

$\frac{\log_{5} (25 x^{2} {(y + 1)}^{3})}{\log_{5} (\sqrt[5]{{(x - 4)}^{3}} {(2 z - 1)}^{3})}$

Step 2

Rewrite $\log_{5} (25 x^{2} {(y + 1)}^{3})$ using the change of base formula.

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Step 2.1

The change of base rule can be used if $a$ and $b$ are greater than $0$ and not equal to $1$ , and $x$ is greater than $0$ .

$\frac{\log_{a} (x) = \frac{\log_{b} (x)}{\log_{b} (a)}}{\log_{5} (\sqrt[5]{{(x - 4)}^{3}} {(2 z - 1)}^{3})}$

Step 2.2

Substitute in values for the variables in the change of base formula, using $b = 10$ .

$\frac{\frac{\log (25 x^{2} {(y + 1)}^{3})}{\log (5)}}{\log_{5} (\sqrt[5]{{(x - 4)}^{3}} {(2 z - 1)}^{3})}$

Step 3

Rewrite $\log_{5} (\sqrt[5]{{(x - 4)}^{3}} {(2 z - 1)}^{3})$ using the change of base formula.

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Step 3.1

The change of base rule can be used if $a$ and $b$ are greater than $0$ and not equal to $1$ , and $x$ is greater than $0$ .

$\frac{\frac{\log (25 x^{2} {(y + 1)}^{3})}{\log (5)}}{\log_{a} (x) = \frac{\log_{b} (x)}{\log_{b} (a)}}$

Step 3.2

Substitute in values for the variables in the change of base formula, using $b = 10$ .

$\frac{\frac{\log (25 x^{2} {(y + 1)}^{3})}{\log (5)}}{\frac{\log (\sqrt[5]{{(x - 4)}^{3}} {(2 z - 1)}^{3})}{\log (5)}}$

Step 4

Multiply the numerator by the reciprocal of the denominator.

$\frac{\log (25 x^{2} {(y + 1)}^{3})}{\log (5)} \cdot \frac{\log (5)}{\log (\sqrt[5]{{(x - 4)}^{3}} {(2 z - 1)}^{3})}$

Step 5

Combine.

$\frac{\log (25 x^{2} {(y + 1)}^{3}) \log (5)}{\log (5) \log (\sqrt[5]{{(x - 4)}^{3}} {(2 z - 1)}^{3})}$

Step 6

Cancel the common factor of $\log (5)$ .

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Step 6.1

Cancel the common factor.

$\frac{\log (25 x^{2} {(y + 1)}^{3}) \log (5)}{\log (5) \log (\sqrt[5]{{(x - 4)}^{3}} {(2 z - 1)}^{3})}$

Step 6.2

Rewrite the expression.

$\frac{\log (25 x^{2} {(y + 1)}^{3})}{\log (\sqrt[5]{{(x - 4)}^{3}} {(2 z - 1)}^{3})}$