document.write( "Question 373663: x^4-8x^2-20=0 \n" ); document.write( "
Algebra.Com's Answer #265920 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!

\n" );
document.write( "Hi,
\n" );
document.write( "x^4-8x^2-20=0
\n" );
document.write( "(x^2 -10)(x^2 +2)= 0
\n" );
document.write( "(x^2 -10)=0
\n" );
document.write( "x^2 = 10
\n" );
document.write( "x = +-\"sqrt%2810%29\"
\n" );
document.write( "(x^2 +2 )= 0
\n" );
document.write( "x^2 = -2
\n" );
document.write( "x = +-\"sqrt%28-2%29\"
\n" );
document.write( "x = +-i\"sqrt%282%29\" \n" );
document.write( "
\n" );