document.write( "Question 31382: factor completely
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Algebra.Com's Answer #18087 by mukhopadhyay(490)\"\" \"About 
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4x^2-28xy+49y^2
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\n" ); document.write( "=(2x)^2-2.2x.7y+(7y)^2
\n" ); document.write( "=(2x-7y)^2
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