document.write( "Question 460458: factor completely: 81r^2 - 64 \n" ); document.write( "
Algebra.Com's Answer #315822 by Tatiana_Stebko(1539)\"\" \"About 
You can put this solution on YOUR website!
\"81r%5E2+-+64\"
\n" ); document.write( "Formula: \"a%5E2-b%5E2=%28a-b%29%28a%2Bb%29\"
\n" ); document.write( "\"81r%5E2+-+64=%289r%29%5E2-8%5E2=%289r-8%29%289r%2B8%29\"
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