document.write( "Question 630736: 1.(x+y+1)²
\n" ); document.write( "2.(x+y-1)²
\n" ); document.write( "3.(x-y-1)²
\n" ); document.write( "4.(-x-y-1)²
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\n" ); document.write( "what is the direct of switching the + sign to -sign on the product?
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Algebra.Com's Answer #397163 by Alan3354(69443)\"\" \"About 
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1.(x+y+1)²
\n" ); document.write( "2.(x+y-1)²
\n" ); document.write( "3.(x-y-1)²
\n" ); document.write( "4.(-x-y-1)²
\n" ); document.write( "question:
\n" ); document.write( "what is the direct of switching the + sign to -sign on the product?
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\n" ); document.write( "1. = x^2 + 2xy + y^2 + 2x + 2y + 1
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\n" ); document.write( "Multiply the others, compare them
\n" ); document.write( "#4 = #1
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