document.write( "Question 700607: Factor and solve
\n" ); document.write( "x^4-2x^2-15=0 \n" ); document.write( "

Algebra.Com's Answer #431891 by checkley79(3341) $\"\"$ $\"About$

You can put this solution on YOUR website!
x^4-2x^2-15=0
\n" ); document.write( "(x^2-5)(x^2+3)=0
\n" ); document.write( "x^2-5=0
\n" ); document.write( "x^2=5
\n" ); document.write( "x=sqrt5=(+-2.235) ans.
\n" ); document.write( "x^2+3=0
\n" ); document.write( "x^2=-3
\n" ); document.write( "x=sqrt-3
\n" ); document.write( "x=(+-1.732i) ans.
\n" ); document.write( " \n" ); document.write( "

\n" );