Algebra Examples

$f (0) = \sqrt{0 - 5}$

Step 1

Subtract $5$ from $0$ .

$f (0) = \sqrt{- 5}$

Step 2

Rewrite $- 5$ as $- 1 (5)$ .

$f (0) = \sqrt{- 1 \cdot 5}$

Step 3

Rewrite $\sqrt{- 1 (5)}$ as $\sqrt{- 1} \cdot \sqrt{5}$ .

$f (0) = \sqrt{- 1} \cdot \sqrt{5}$

Step 4

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

$f (0) = i \sqrt{5}$