document.write( "Question 135317: x^4-x^2-42=0 \n" ); document.write( "

Algebra.Com's Answer #99141 by edjones(8007) $\"\"$ $\"About$

You can put this solution on YOUR website!
x^4-x^2-42=0
\n" ); document.write( "(x^2-7)(x^2+6)=0
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\n" ); document.write( "x^2=7
\n" ); document.write( "x=sqrt(7), x=-sqrt(7)
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\n" ); document.write( "If you use imaginary numbers:
\n" ); document.write( "x^2=-6
\n" ); document.write( "x=sqrt(6)i, x=-sqrt(6)i
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\n" ); document.write( "Ed \n" ); document.write( "

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