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

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Question 1006922: Simplify answer and check by raising it back to the 4th power. Please show work.


Found 2 solutions by fractalier, Edwin McCravy:
Answer by fractalier(6550)   (Show Source): You can put this solution on YOUR website!
The fourth root of
= +/-
because
=
Answer by Edwin McCravy(20054)   (Show Source): You can put this solution on YOUR website!
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
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