document.write( "Question 1165796: there exist two real number x, y such that the product of their sum and difference is equal to the difference of their square
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Algebra.Com's Answer #790275 by ikleyn(52803)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "For any two real numbers x and y, the product of their sum (x+y) and their difference (x-y)
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\n" ); document.write( "\n" ); document.write( "See the lesson\r
\n" ); document.write( "\n" ); document.write( "    - The difference of squares formula \r
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