document.write( "Question 161207: x^4-64 \n" ); document.write( "

Algebra.Com's Answer #118746 by jojo14344(1513) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( " $\"x%5E4-64=0\"$
\n" ); document.write( " $\"%28x%5E2-8%29%28x%5E2%2B8%29=0\"$ ---> $\"system%28x%5E2=8%2Cx%5E2=-8%29\"$
\n" ); document.write( " $\"x=sqrt%288%29\"$ ---> Good!
\n" ); document.write( " $\"x=sqrt%28-8%29\"$ , don't use
\n" ); document.write( "Go back to check:
\n" ); document.write( " $\"%28sqrt%288%29%29%5E4-64=0\"$ ---> $\"%288%5E%281%2F2%29%29%5E4-64=0\"$
\n" ); document.write( " $\"%288%5E%281%2Fcross%282%29%29%29%5Ecross%284%292-64=0\"$
\n" ); document.write( " $\"8%5E2-64=0\"$
\n" ); document.write( " $\"64-64=0\"$
\n" ); document.write( " $\"0=0\"$
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo \n" ); document.write( "

\n" );