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Aleksandr-060686
[28]
3 years ago
5
From the sum of 3a²-a-3 and 2a-9,subtract a²-3a-7
Mathematics
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1
answer:
ANEK
[815]
3 years ago
8
0
The sum of 3a²-a-3 and 2a-9 is 3a²+a-12
3a²+a-12 - (a²-3a-7) = 3a²+a-12 - a² + 3a + 7 =
2a² +4a - 5
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