document.write( "Question 348704: 3x^4-81xy^3 i need help on how to work it out \n" ); document.write( "
Algebra.Com's Answer #249271 by vleith(2983)\"\" \"About 
You can put this solution on YOUR website!
\"3x%5E4-81xy%5E3\"
\n" ); document.write( "\"3x%2A+%28x%5E3+-+27y%5E3%29\" The terms on the right are a difference of 2 cubes
\n" ); document.write( "Use this formula to solve
\n" ); document.write( "http://www.purplemath.com/modules/specfact2.htm\r
\n" ); document.write( "\n" ); document.write( "Here is the solution
\n" ); document.write( "http://www.wolframalpha.com/input/?i=3x^4-81xy^3
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