Trying to help my son with negative indices. I understand the basic "negative indices are just reciprocals" (eg, 5n raised to the negative 2 = 5 x n raised to the 1/2).
But I have now something like this:
3p^ -4 q^ -1
-----------------
6p^ 2 q^ -4
and
3^2 x 9^3
--------------
3^3 x 9^2
And...