document.write( "Question 720674: solve all real and imaginary solution
\n" ); document.write( "z^4-16=0
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Algebra.Com's Answer #441932 by Alan3354(69443)\"\" \"About 
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z^4-16=0
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\n" ); document.write( "\"z%5E4+=+16\"
\n" ); document.write( "\"z%5E2+=+4\"
\n" ); document.write( "z = -2, +2
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\n" ); document.write( "\"z%5E2+=+-4\"
\n" ); document.write( "z = -2i, +2i
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