document.write( "Question 998842: Factor the difference of two squares.
\n" ); document.write( "(2x + 5)^2 − (x − 4)^2 \n" ); document.write( "
Algebra.Com's Answer #616581 by rothauserc(4718)\"\" \"About 
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(2x + 5)^2 − (x − 4)^2
\n" ); document.write( "compute the squares
\n" ); document.write( "4x^2 +20x +25 - (x^2 -8x +16)
\n" ); document.write( "now distribute - sign
\n" ); document.write( "4x^2 +20x +25 -x^2 +8x -16
\n" ); document.write( "combine terms
\n" ); document.write( "3x^2 +28x +9
\n" ); document.write( "factor polynomial
\n" ); document.write( "(3x+1) * (x+9)
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