document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1023773>Question 1023773</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What two numbers multiplies to -8000 but add to +20? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #639285 by </B><A HREF=/tutors/aboutme.mpl?userid=msalonga><B>msalonga(4)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=msalonga><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=639285\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> eq 1. xy = -8000<BR>\n" );
document.write( "eq 2. x+y = 20\r<BR>\n" );
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document.write( "from eq 2. y = 20 - x<BR>\n" );
document.write( "substituting y to eq. 2\r<BR>\n" );
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document.write( "x(20-x) = -8000\r<BR>\n" );
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document.write( "20x - x^2 = -8000, rearraging to ax^2 + bx + c = 0\r<BR>\n" );
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document.write( "x^2 - 20x - 8000 = 0; a = 1; b = -20; c = -8000\r<BR>\n" );
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document.write( "using quadratic formula<BR>\n" );
document.write( "x = 100 and -80 </SPAN>\n" );
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