Answer:
It's the first choice -4 a^12b^8 / 5.
Explanation:
- 8a^8 b^-2 / 10a^-4 b^-10
= -4 a^(8 - -4) b^(-2 - -10) / 5
= -4 a^12b^8 / 5
Answer: first choice
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