document.write( "Question 633785: Simplify\n" ); document.write( " √(x-y)√(x+y) \n" ); document.write( "
\n" ); document.write( "Hi,\n" ); document.write( "Simplify\n" ); document.write( " √(x-y)√(x+y)\n" ); document.write( "