Answer:
397
Step-by-step explanation:
200^2 - 1 = 40000 - 1 = 39999
199^2 + 1 = 39601+ 1 = 39602
Difference = 397
A couple of things you should keep in mind.
- Between means that the end points are not included. That means you do not subtract 39601 from 40000 to get the answer.
- The minus 1 from 40000 makes sure that you exclude 40000
- The plus 1 added to 39601 makes sure that you exclude 49601
