Basic Math Examples

$2 \sqrt{- 19 + 4} \cdot 4$

Step 1

Add $- 19$ and $4$ .

$2 \sqrt{- 15} \cdot 4$

Step 2

Rewrite $- 15$ as $- 1 (15)$ .

$2 \sqrt{- 1 (15)} \cdot 4$

Step 3

Rewrite $\sqrt{- 1 (15)}$ as $\sqrt{- 1} \cdot \sqrt{15}$ .

$2 (\sqrt{- 1} \cdot \sqrt{15}) \cdot 4$

Step 4

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

$2 (i \cdot \sqrt{15}) \cdot 4$

Step 5

Multiply $4$ by $2$ .

$8 i \sqrt{15}$