document.write( "Question 5529: Which of the following t^4-81? \n" ); document.write( "
Algebra.Com's Answer #2838 by Abbey(339)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "this factors as the difference of squares:
\n" ); document.write( "(\"%28t%5E2%2B9%29%28t%5E2-9%29\"
\n" ); document.write( "and \"t%5E2-9\" factors again to the difference of squares, so the final answer is
\n" ); document.write( "\"%28t%5E2%2B9%29%28t-3%29%28t%2B3%29\"
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