document.write( "Question 289931: I'm looking for the answer to the question\r
\n" ); document.write( "\n" ); document.write( "x^4-81x^2=0\r
\n" ); document.write( "\n" ); document.write( "I know it's GCF but what is the answer?
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Algebra.Com's Answer #209883 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
\"x%5E4-81x%5E2=0\"
\n" ); document.write( "\"x%5E2%28x%5E2-81%29=0\"
\n" ); document.write( "Use the zero product rule,
\n" ); document.write( "\"x%5E2=0\"
\n" ); document.write( "\"highlight%28x=0%29\"
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\n" ); document.write( "\"x%5E2-81=0\"
\n" ); document.write( "\"x%5E2=81\"
\n" ); document.write( "\"highlight%28x=-9%29\", \"highlight%28x=9%29\"
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