Thats for questions 3 - 8 that you didn't answer. I'm not quite sure how to answer the last two though.
8a³ (2 − 4a²) ;
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Note: " 8a³ " is the greatest common factor (GCF).
The answer would be 2/5 is equal to 10/25 and 1/5 would be 5/25
The problems with the region of existing is that the rulers will get confused on who is existing