Answer:
1. a^2 + 6a + 9
4. b^2 + 8ab + 16a^2
5. -16a^2 + 6a^2
6. b^2 -6b + 8
9. -2ab -6a +4a^2
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Answer:
1. a^2 + 6a + 9
4. b^2 + 8ab + 16a^2
5. -16a^2 + 6a^2
6. b^2 -6b + 8
9. -2ab -6a +4a^2