Answer:
Step-by-step explanation:
=
- 2ab + 
Hope this helps
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Answer:
1,000.
Step-by-step explanation:
Answer: a
Step-by-step explanation:
Answer:
First clear your question please.
Step-by-step explanation:
There are 10 digits possible for each of the 4 places .
So the number of digits possible is 10^4 = 10,000