document.write( "Question 8434: Ok, some of these types of problems, for example \"3x%5E4-81x\", I understand, but in \"16a%5E4-2a\", I don't get it. I know you're supposed to factor out the GCF, but I'm lost. Help would be very appreciated. \n" ); document.write( "
Algebra.Com's Answer #4657 by khwang(438)\"\" \"About 
You can put this solution on YOUR website!
\"3x%5E4-81x\"\r
\n" ); document.write( "\n" ); document.write( " = 3x \"x%5E3+-+27\"
\n" ); document.write( " = 3x(x-3)\"%28x%5E2+%2B+3x+%2B+9%29\" [by using \"x%5E3-a%5E3\" = (x-a)\"%28x%5E2%2B+ax+%2Ba%5E2%29\" ]\r
\n" ); document.write( "\n" ); document.write( " Why nobody pointed out the mistake of another solution?\r
\n" ); document.write( "\n" ); document.write( " Kenny
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