document.write( "Question 903854: How do I factor this?\r
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\n" ); document.write( "\n" ); document.write( "The answer is (x -2) (x + 2) (x -3) (x + 3)\r
\n" ); document.write( "\n" ); document.write( "This seems to be a case of difference of squares, but I don't know how to factor it with a 4th degree.
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Algebra.Com's Answer #548336 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
\"x%5E4-13x%5E2%2B36\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E4-4x%5E2-9x%5E2%2B36\" -4 and -9 both add to -13 and multiply to 36\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2%28x%5E2-4%29%2B%28-9x%5E2%2B36%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2%28x%5E2-4%29-9%28x%5E2-4%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28x-3%29%28x%2B3%29%28x%5E2-4%29\" Difference of squares rule\r
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\n" ); document.write( "\n" ); document.write( "\"%28x-3%29%28x%2B3%29%28x-2%29%28x%2B2%29\" Difference of squares rule\r
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\n" ); document.write( "\n" ); document.write( "Note: the order of the factors doesn't matter.
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