document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=151897>Question 151897</A>: <I><SPAN STYLE=\"word-break: break-all;\"> factorise 20ax-15ay-4bx-3by </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #111674 by </B><A HREF=/tutors/aboutme.mpl?userid=nabla><B>nabla(475)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nabla><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=111674\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The first two terms have 5a in common. The second two have b. Make sure that  I am correct in assuming you misstyped the 2nd minus sign.\r<BR>\n" );
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document.write( "20ax-15ay+4bx-3by=5a(4x-3y)+b(4x-3y)=(5a+b)(4x-3y)<BR>\n" );
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