document.write( "Question 309793: Factor completly 81x^2 - 441y^2\r
\n" ); document.write( "\n" ); document.write( "I was able to break down the first part but had problems breaking down the 441y^2
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Algebra.Com's Answer #221559 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Factor completly 81x^2 - 441y^2
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\n" ); document.write( "441 is 21^2
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\n" ); document.write( "(9x-21y)(9x+21y)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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