document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=882141>Question 882141</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me to solve this problem. Given that (x + y)*2=63 and xy=65, find the value of x*2 + y*2 - 1.  Thank you...<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 #532723 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=532723\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Question almost looks like a rectangle problem.\r<BR>\n" );
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document.write( "You want x and y solutions.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%2B2y=63 ALIGN=MIDDLE  ALT=\"2x%2B2y=63\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=%2863-2x%29%2F2 ALIGN=MIDDLE  ALT=\"y=%2863-2x%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Substitute.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2863-2x%29%2F2=65 ALIGN=MIDDLE  ALT=\"x%2863-2x%29%2F2=65\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2863-2x%29=130 ALIGN=MIDDLE  ALT=\"x%2863-2x%29=130\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2x%5E2%2B63x-130=0 ALIGN=MIDDLE  ALT=\"-2x%5E2%2B63x-130=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%5E2-63x%2B130=0 ALIGN=MIDDLE  ALT=\"2x%5E2-63x%2B130=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "D=(63)^2-4*2*130=3969-1040=2929=101*29<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x=%2863%2B-+sqrt%282929%29%29%2F%282%2A2%29%29 ALIGN=MIDDLE  ALT=\"highlight%28x=%2863%2B-+sqrt%282929%29%29%2F%282%2A2%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The results for x will be positive either way, so you might expect y to be the other value; the PLUS form is one dimension and the MINUS form is the other dimension.  \r<BR>\n" );
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document.write( "You can finish from that. </SPAN>\n" );
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