document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=676943>Question 676943</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 9a^4-b^2=?\r<BR>\n" );
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document.write( "25a^2-30a^2+9=?\r<BR>\n" );
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document.write( "36x^2+60x+25=?\r<BR>\n" );
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document.write( "factor x^10-y^2=?\r<BR>\n" );
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document.write( "x^2-9=?\r<BR>\n" );
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document.write( "4n^2+28n+49=?\r<BR>\n" );
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document.write( "36y^2-1=?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #420616 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=420616\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 9a^4-b^2<BR>\n" );
document.write( "It's a difference of 2 squares<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5E2+-+b%5E2+=+%28a-b%29%2A%28a%2Bb%29 ALIGN=MIDDLE  ALT=\"a%5E2+-+b%5E2+=+%28a-b%29%2A%28a%2Bb%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "25a^2-30a^2+9<BR>\n" );
document.write( "The 1st and last terms are squares.<BR>\n" );
document.write( "Try that first.<BR>\n" );
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document.write( "36x^2+60x+25=?<BR>\n" );
document.write( "The 1st and last terms are squares.<BR>\n" );
document.write( "Try that first.<BR>\n" );
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document.write( "factor x^10-y^2=?<BR>\n" );
document.write( "Same as #1<BR>\n" );
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document.write( "x^2-9<BR>\n" );
document.write( "Same as #1<BR>\n" );
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document.write( "4n^2+28n+49<BR>\n" );
document.write( "The 1st and last terms are squares.<BR>\n" );
document.write( "Try that first.<BR>\n" );
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document.write( "36y^2-1=?<BR>\n" );
document.write( "Same as #1 </SPAN>\n" );
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