document.write( "Question 1026661: (Factorise) Find the difference of two squares:\r
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Algebra.Com's Answer #641937 by Theo(13342)\"\" \"About 
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16x^2 - 25y^2 is equal to:\r
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\n" ); document.write( "\n" ); document.write( "(4x)^2 - (5y^2) which is equal to:\r
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\n" ); document.write( "\n" ); document.write( "(4x-5y) * (4x + 5y)\r
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