Question

(3x)^-2

Answer 1

so then a^-1 = 1/a

in this case how will result ?

Answer 2

and a^-2 = 1/a^2

this will help you

Answer 3

try it courage i will help you

Answer 4

$$\Huge\text{Definition: }$$
$$\Huge a^{-n}=\frac{1}{a^n}$$

Answer 5

$$\Huge (ab)^m= a^m b^m$$