Question

Which expression is equivalent to (3a)–2?

Answer 1

1/9a^2 which is A on edge

Answer 2

`(1)/(9a^(2))`

Explanation:

We have been given an expression
`(3a)^(-2)`

We can see that our expression have an negative exponent.

We will use property of exponents for negative exponents to simplify our expression, which states that
`x^(-b)=(1)/(x^(b))`. Upon using this property we will get,

`(3a)^(-2)=(1)/((3a)^(2))`

Upon squaring 3a we will get,

`(1)/(9a^(2))`

Therefore,
`(1)/(9a^(2))` will be equivalent expression of our given expression.