
This is because 
And 
For this reason, 
Positive indices mean we have to multiply the same number twice or thrice based on the value of the index. On the other hand, negative indices mean we have to divide by the same number twice or thrice based on the value of the index.
Imagine that 1 box = 1000 blocks.
It'll be 2 boxes, 4 cases, 1 stack, and 0 single blocks.
Answer:

Step-by-step explanation:
Factor using the perfect square rule.
:)