document.write( "Question 471197: Factor each expression as a difference of squares.
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\n" ); document.write( "x^2-2xy+y^2-4
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Algebra.Com's Answer #323197 by MathLover1(20850)\"\" \"About 
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1.\r
\n" ); document.write( "\n" ); document.write( "\"4p%5E2-%28q-2r%29%5E2+\"\r
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\n" ); document.write( "\n" ); document.write( "\"%282p%29%5E2-%28q-2r%29%5E2+\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28%282p%29-%28q-2r%29%29%28%282p%29%2B%28q-2r%29%29+\"\r
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\n" ); document.write( "\n" ); document.write( "\"%282p-q%2B2r%29%282p%2Bq-2r%29+\"\r
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\n" ); document.write( "\n" ); document.write( "2.\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2-2xy%2By%5E2-4\".group\r
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\n" ); document.write( "\n" ); document.write( "\"%28x%5E2-2xy%2By%5E2%29-4\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28x-y%29%5E2-4\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28x-y%29%5E2-2%5E2\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28%28x-y%29-2%29%28%28x-y%29%2B2%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28x-y-2%29%28x-y%2B2%29\"\r
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