document.write( "Question 628443: steps to solve x^4 + 2x^2-15=0 \n" ); document.write( "
Algebra.Com's Answer #395614 by lwsshak3(11628)\"\" \"About 
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steps to solve x^4 + 2x^2-15=0
\n" ); document.write( "factor
\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=±√-5
\n" ); document.write( "x=±(√5) i
\n" ); document.write( "or
\n" ); document.write( "x^2-3=0
\n" ); document.write( "x^2=3
\n" ); document.write( "x=±√3
\n" ); document.write( "two real roots: ±√3
\n" ); document.write( "two imaginary or non-real roots: ±(√5) i \n" ); document.write( "
\n" );