document.write( "Question 68560: 81x^4-16y^4
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Algebra.Com's Answer #48781 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
81x^4-16y^4
\n" ); document.write( "Rewrite as: (3x)^4 -(2y)^4
\n" ); document.write( "Factor as: [(3x)^2 + (2y)^2][(3y+2y)][(3x)-(2x)]
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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