document.write( "Question 59024: solve x^4-8x^2+7=0 \n" ); document.write( "

Algebra.Com's Answer #40506 by venugopalramana(3286) $\"\"$ $\"About$

You can put this solution on YOUR website!
solve x^4-8x^2+7=0
\n" ); document.write( "X^4-X^2-7X^2+7=0
\n" ); document.write( "X^2(X^2-1)-7(X^2-1)=0
\n" ); document.write( "(X^2-1)(X^2-7)=0
\n" ); document.write( "(X-1)(X+1)(X-SQRT7)(X+SQRT7)=0
\n" ); document.write( "X=1..........OR
\n" ); document.write( "X=-1....OR
\n" ); document.write( "X=SQRT7........OR
\n" ); document.write( "X=-SQRT7 \n" ); document.write( "

\n" );