document.write( "Question 90059: 81r^4-256s^4 \n" ); document.write( "
Algebra.Com's Answer #65389 by checkley75(3666)\"\" \"About 
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81r^4-256s^4
\n" ); document.write( "(9r^2+16s^2)(9r^2-16s^2)
\n" ); document.write( "(9r^2+16s^2)(3r+4s)(3r-4s)
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