document.write( "Question 3677: 3x^3 + 81 i just cant figure it out its been all day \n" ); document.write( "

Algebra.Com's Answer #1638 by longjonsilver(2297) $\"\"$ $\"About$

You can put this solution on YOUR website!
what do you want? to factorise it?\r
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\n" ); document.write( "\n" ); document.write( " $\"3%28x%5E3+%2B+27%29\"$
\n" ); document.write( " $\"3%28x%5E3+%2B+3%5E3%29\"$ \r
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\n" ); document.write( "\n" ); document.write( "now, $\"a%5E3+%2B+b%5E3\"$ is equivalent to $\"%28a%2Bb%29%28a%5E2-ab%2Bb%5E2%29\"$ , so for ours, we get:\r
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\n" ); document.write( "\n" ); document.write( " $\"3%28x%2B3%29%28x%5E2-3x%2B9%29\"$ \r
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\n" ); document.write( "\n" ); document.write( "jon.
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