document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=631470>Question 631470</A>: <I><SPAN STYLE=\"word-break: break-all;\"> completely factor the expression 16x^4-81y^4<BR>\n" );
document.write( "a. (2x+3y)(2x-3y)(4x^2+9y^2)<BR>\n" );
document.write( "b. prime<BR>\n" );
document.write( "c. 0<BR>\n" );
document.write( "d. (4x^2-9y^2)(4x^2+9y^2)\r<BR>\n" );
document.write( "\n" );
document.write( "If you could please explain I would really appreciate it </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #397604 by </B><A HREF=/tutors/aboutme.mpl?userid=Tatiana_Stebko><B>Tatiana_Stebko(1539)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Tatiana_Stebko><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/cgi-bin/show-face.mpl?user=Tatiana_Stebko><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=397604\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Use the difference of two squares formula<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5E2-b%5E2=%28a-b%29%28a%2Bb%29 ALIGN=MIDDLE  ALT=\"a%5E2-b%5E2=%28a-b%29%28a%2Bb%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16x%5E4-81y%5E4=4%5E2%28x%5E2%29%5E2-9%5E2%28y%5E2%29%5E2=%284x%5E2%29%5E2-%289y%5E2%29%5E2=%284x%5E2-9y%5E2%29%284x%5E2%2B9y%5E2%29=%28%282x%29%5E2-%283y%29%5E2%29%284x%5E2%2B9y%5E2%29=%282x-3y%29%282x%2B3y%29%284x%5E2%2B9y%5E2%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Answer: a. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282x%2B3y%29%282x-3y%29%284x%5E2%2B9y%5E2%29 ALIGN=MIDDLE  ALT=\"%282x%2B3y%29%282x-3y%29%284x%5E2%2B9y%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );