document.write( "Question 815343: Show that the square of the sum of two numbers minus the square of their difference is equal to four times their product. let a represent one number and b represent the other number.\r
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Algebra.Com's Answer #490937 by TimothyLamb(4379)\"\" \"About 
You can put this solution on YOUR website!
(a + b)(a + b) - (a - b)(a - b) = 4ab
\n" ); document.write( "(a + b)(a + b) - (a - b)(a - b)
\n" ); document.write( "aa + 2ab + bb - (aa - 2ab + bb)
\n" ); document.write( "aa + 2ab + bb - aa + 2ab - bb
\n" ); document.write( "2ab + 2ab
\n" ); document.write( "4ab
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\n" ); document.write( "Convert fractions, decimals, and percents:
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