Posted by ROCKY on Saturday, July 30, 2011 at 9:52pm.
rewrite with positive exponents. Assume that even roots are of nonnegative quantities and that all denominators are nonzero.
[3}^4

ua^2}

intermediate algebra  Henry, Sunday, July 31, 2011 at 5:27pm
3^4
Multiply numerator and denominator by 3^4:
3^4 * 3^4 / 3^4= 1/3^4.