Answer:
9-10 are not clear, I didn't get it, sorry.
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Answers & Comments
Answer:
1. -(-a²-10a-4)
2. x²-2x+6
3. -(a²-7a+7)
4. 6a²-2a-2
5. 7x²-5x+5
6. -(4x²+12x+8)
7. -3x+1
8. -3x+4
9-10 are not clear, I didn't get it, sorry.