Math please help
posted by Amy .
1. Simplify the expression ((5x^2)/(4x^2))^2
2. (x)/(x^281)(9)/(81x^2) =
For the first one the answer was 16x^8/25 but I don't know how to get that. For the second one the answer is 1/x9 and I also don't know how to get that one.

Amy , you should check if your previous same post has been answered before posting it again
http://www.jiskha.com/display.cgi?id=1295837377