I have 3 raised to the (x^2 - 1) / 9 raised to (x + 2) = one-nineth.

So first I set up common bases.

I have 3 raised to the (x^2 - 1) divided by 3 raised to the (2x + 4) = one-nineth.

Now I am stuck. I have the same bases but am I suppose subtract the exponents?

Can someone please help me get over this hump?