document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=200867>Question 200867</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 9x^2+4y^2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #151224 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=151224\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 9x^2 +4y^2<BR>\n" );
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document.write( "very  interesting  problem.<BR>\n" );
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document.write( "If  this  was ,, 9x^2 -4y^2 ,, just  factor  difference  of  squares,,,<BR>\n" );
document.write( "(3x+2y)(3x-2y).  To  use  this  form  on  the  positive,  lets  rewrite  the  eqn<BR>\n" );
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document.write( "(9x^2 - (-4) y^2<BR>\n" );
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document.write( "(3x+sqrt(-4)y) (3x- sqrt(-4)y)<BR>\n" );
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document.write( " (3x+2iy) (3x - 2iy)<BR>\n" );
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document.write( "check  using  FOIL<BR>\n" );
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document.write( "F = 9x^2,,,,O= -6ixy,,,I = +6ixy ,,,,L = -4i^2 y^2 = 9x^2 +4y^2,,(i^2 = -1),,,,,ok </SPAN>\n" );
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