Question

Rewrite with positive exponents. Assume that even roots are of nonnegative quantities and that all denominators are nonzero.
(4xy ^– 2)^– 2

Answer 1

y^(-2) =1/y^2 so than will be
(4x/y^2)^-2 what will be

1 1 y^4
----------- = ----------- = -------
(4x/y^2)^2 16x^2 16x^2
--------
y^4