Evaluate square root of -7

$\sqrt{- 7}$

Step 1

Rewrite $- 7$ as $- 1 (7)$ .

$\sqrt{- 1 (7)}$

Step 2

Rewrite $\sqrt{- 1 (7)}$ as $\sqrt{- 1} \cdot \sqrt{7}$ .

$\sqrt{- 1} \cdot \sqrt{7}$

Step 3

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

$i \sqrt{7}$