document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=255006>Question 255006</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use the difference of two squares formula to factor. Be sure to factor out any common factors.<BR>\n" );
document.write( "y^2 - 49, 4x^2 - 25 and 81x^2 - 1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #187351 by </B><A HREF=/tutors/aboutme.mpl?userid=palanisamy><B>palanisamy(496)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=palanisamy><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=187351\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1) y^2-49 = y^2-7^2<BR>\n" );
document.write( "          = (y+7)(y-7)<BR>\n" );
document.write( "2) 4x^2-25= (2x)^2-5^2<BR>\n" );
document.write( "          = (2x+5)(2x-5)<BR>\n" );
document.write( "3) 81x^2-1 = (9x)^2-1^2<BR>\n" );
document.write( "           = (9x+1)(9x-1)<BR>\n" );
document.write( "   </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );