Precalculus Examples

$2 \log_{2} (25)$

Step 1

Rewrite $\log_{2} (25)$ as $\log_{2} (5^{2})$ .

$2 \log_{2} (5^{2})$

Step 2

Expand $\log_{2} (5^{2})$ by moving $2$ outside the logarithm.

$2 (2 \log_{2} (5))$

Step 3

Multiply $2$ by $2$ .

$4 \log_{2} (5)$