document.write( "Question 38200: 5x^2-20y^2 \n" ); document.write( "
Algebra.Com's Answer #23668 by fractalier(6550)\"\" \"About 
You can put this solution on YOUR website!
From 5x^2 - 20y^2, we first factor out the 5 and get
\n" ); document.write( "5(x^2 - 4y^2)
\n" ); document.write( "But x^2 - 4y^2 is the difference of squares, and can be factored again...
\n" ); document.write( "5(x^2 - 4y^2) =
\n" ); document.write( "5(x + 2y)(x - 2y)
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