document.write( "Question 1006922: Simplify answer and check by raising it back to the 4th power. Please show work.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"+sqrt%28+81x%5E4y%5E16z%5E28+%29+\"$ \n" ); document.write( "

Algebra.Com's Answer #622954 by Edwin McCravy(20054) $\"\"$ $\"About$

You can put this solution on YOUR website!

\r\n" );
document.write( "That's a square root not a fourth root.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The square root is the 2nd root, so write in the understood index, 2.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Write 81 as 9²\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Divide the index 2 into each exponent and\r\n" );
document.write( "that removes the square root since 2 will go into\r\n" );
document.write( "each exponent evenly, without leaving any remainder.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );