Algebra Examples

$f (- 13) = 2 \sqrt{- 13}$

Step 1

Rewrite $- 13$ as $- 1 (13)$ .

$f (- 13) = 2 \sqrt{- 1 \cdot 13}$

Step 2

Rewrite $\sqrt{- 1 (13)}$ as $\sqrt{- 1} \cdot \sqrt{13}$ .

$f (- 13) = 2 (\sqrt{- 1} \cdot \sqrt{13})$

Step 3

Rewrite $\sqrt{- 1}$ as $i$ .

$f (- 13) = 2 i \sqrt{13}$