document.write( "Question 624889: (x^2+y^4)(x^2-y^4) \n" ); document.write( "
Algebra.Com's Answer #393145 by jim_thompson5910(35256)\"\" \"About 
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(x^2+y^4)(x^2-y^4)\r
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\n" ); document.write( "\n" ); document.write( "x^2(x^2-y^4)+y^4(x^2-y^4)\r
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\n" ); document.write( "\n" ); document.write( "x^4-x^2y^4+x^2y^4-y^8\r
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\n" ); document.write( "\n" ); document.write( "x^4-y^8\r
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\n" ); document.write( "\n" ); document.write( "So (x^2+y^4)(x^2-y^4) = x^4-y^8\r
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