document.write( "Question 320553: multiply (2x+7y)(2x-7y) \n" ); document.write( "
Algebra.Com's Answer #229561 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "This is the product of two conjugates. The product is the difference of two squares. Follow the pattern:\r
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