SOLUTION: Simplify answer and check by raising it back to the 4th power. Please show work. {{{ sqrt( 81x^4y^16z^28 ) }}}

That's a square root not a fourth root.



The square root is the 2nd root, so write in the understood index, 2.



Write 81 as 92



Divide the index 2 into each exponent and
that removes the square root since 2 will go into
each exponent evenly, without leaving any remainder.






Edwin