document.write( "Question 259515: i need to factor 8x^9 + 729y^3 and I seem to mess it up everytime I try to do this. Could you give me steps in which to take to solve this probem? \n" ); document.write( "

Algebra.Com's Answer #191036 by Earlsdon(6294) $\"\"$ $\"About$

You can put this solution on YOUR website!
Factor:
\n" ); document.write( " $\"8x%5E9%2B729y%5E3\"$ First, do you recognise this as the sum of two cubes?
\n" ); document.write( " $\"%282x%5E3%29%5E3%2B%289y%29%5E3\"$
\n" ); document.write( "Recall that the sum of two cubes is factorable as:
\n" ); document.write( " $\"A%5E3%2BB%5E3+=+%28A%2BB%29%28A%5E2-AB%2BB%5E2%29\"$ and, here: $\"A+=+2x%5E3\"$ and $\"B+=+9y\"$ , so...
\n" ); document.write( " $\"8x%5E9%2B729y%5E3+=+highlight%28%282x%5E3%2B9y%29%284x%5E6-18x%5E3y%2B81y%5E2%29%29\"$ \n" ); document.write( "

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