Answer
$-5i\sqrt 2$
Work Step by Step
Step 1: $-\sqrt (-50)$
Step 2: $-\sqrt (-1\times50)$
Step 3: $-\sqrt (-1)\times\sqrt 50$
Step 4: $\sqrt (-1)=i$ and $\sqrt 50=\sqrt (2\times25)$
Step 5: $-i\sqrt (2\times25)$
Step 6: $-i\times5\times\sqrt 2$
Step 7: $-5i\sqrt 2$
