Answer:
Explanation:
What you have to do is keep the x and then subtract 7 from 9 which would be and then to make it positive you have to "invert" and that's why goes in the bottom, with 1 on top.
Answer: 1/x^2 or x^-2
dividing exponents is subtracting so 1/x^(9-7) or 1/x^2
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