Question

How do you simplify `(9a b ^ { - 3} ) ^ { - 2}`?

Answer 1

`b^6/(81a^2)`

Explanation:

Know that, `a^-b=1/(a^b)`

`:.(9ab^-3)^-2=1/(9ab^-3)^2`

`=1/(81a^2b^-6)`

`=b^6/(81a^2)`