document.write( "Question 32542: z^4 -11z^2 +30=0 \n" ); document.write( "
Algebra.Com's Answer #19008 by mukhopadhyay(490)\"\" \"About 
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z^4 -11z^2 +30=0
\n" ); document.write( "=> (z^2-6)(z^2-5)=0
\n" ); document.write( "=> z=sqrt(6) or z=-sqrt(6) or z=sqrt(5) or z=-sqrt(5)
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