So let’s say we have (3/2)^-2. We know that any negative exponent means we have to put that number under 1, with a positive exponent:
1 / (3/2)^2
There’s also another thing we can do. There’s a rule in maths that says we can get the positive exponent if we just flip the fraction, so we get:
(3/2)^-2
Flip it:
(2/3)^2
It would be the same as 1 / (3/2)^2, since that would be 1/1 / 9/4, resulting in 4/9 (multiply inner part with inner part (9*1) and that goes under, and outer with outer (4*1) and that goes over). (2/3)^2 is also 4/9, so both ways are valid.
