document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1116627>Question 1116627</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Factorise : a^2-b^2-4ac+4c^2  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #731536 by </B><A HREF=/tutors/aboutme.mpl?userid=math_helper><B>math_helper(2461)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math_helper><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=math_helper><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=731536\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Factor <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+a%5E2-b%5E2-4ac%2B4c%5E2+ ALIGN=MIDDLE  ALT=\"+a%5E2-b%5E2-4ac%2B4c%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "—————————————————————\r<BR>\n" );
document.write( "\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28a%5E2-4ac%2B4c%5E2%29+-+b%5E2+ ALIGN=MIDDLE  ALT=\"+%28a%5E2-4ac%2B4c%5E2%29+-+b%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28a-2c%29%5E2+-+b%5E2+ ALIGN=MIDDLE  ALT=\"+%28a-2c%29%5E2+-+b%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "This is the difference between two squares, and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x%5E2-y%5E2+=+%28x-y%29%28x%2By%29+ ALIGN=MIDDLE  ALT=\"+x%5E2-y%5E2+=+%28x-y%29%28x%2By%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+highlight%28+%28a-2c-b%29%28a-2c%2Bb%29+%29 ALIGN=MIDDLE  ALT=\"+highlight%28+%28a-2c-b%29%28a-2c%2Bb%29+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "—————————————<BR>\n" );
document.write( "Check:<BR>\n" );
document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++%28a-2c-b%29%28a-2c%2Bb%29+=++%28a%5E2-2ac%2Bcross%28ab%29%29%2B%28-2ac%2B4c%5E2+-+cross%282bc%29%29%2B%28cross%28-ab%29%2Bcross%282bc%29-b%5E2%29+ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+a%5E2+-+4ac+%2B4c%5E2+-b%5E2+ ALIGN=MIDDLE  ALT=\"+a%5E2+-+4ac+%2B4c%5E2+-b%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" >  (ok) </SPAN>\n" );
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