The problem is to evaluate the radical -³√1000. To solve this, we need to re-write the value 1000 into the base of 10 such as 1000=10³.
Then, it changes to -³√10³. We need to pull out the terms out of the radical, thus, we have -1 *10.
Lastly, we multiply -1 to 10 and the answer is -10.
