document.write( "Question 574631: 16b^2-81 Factor completely \n" ); document.write( "
Algebra.Com's Answer #369196 by ankor@dixie-net.com(22740)\"\" \"About 
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16b^2-81 Factor completely
\n" ); document.write( "You can see that this is the \"difference of squares\"
\n" ); document.write( "(4b + 9)(4b - 9)
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