document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=6173>Question 6173</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having trouble understanding how the answer was arived at on the following problem:\r<BR>\n" );
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document.write( "5X^2Y^2Z^3-X^2Y WHERE X=-2, Y=5, Z=-1\r<BR>\n" );
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document.write( "Here is my work<BR>\n" );
document.write( "5*-2^2*5^2*-1^3--2^2*5<BR>\n" );
document.write( "=500 - (-)20<BR>\n" );
document.write( "=520\r<BR>\n" );
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document.write( "The answer from my test was -520.  How is this negative?\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #3286 by </B><A HREF=/tutors/aboutme.mpl?userid=guapa><B>guapa(62)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=guapa><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=3286\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let me split it up and compute the variables first.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2 ALIGN=MIDDLE  ALT=\"x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-2%29%28-2%29=4 ALIGN=MIDDLE  ALT=\"%28-2%29%28-2%29=4\"   DISABLED_style= \"max-width:90%; height:auto;\" > to multiply 2 negative signs equals a positive.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%5E2 ALIGN=MIDDLE  ALT=\"y%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285%29%285%29=25 ALIGN=MIDDLE  ALT=\"%285%29%285%29=25\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z%5E3 ALIGN=MIDDLE  ALT=\"z%5E3\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-1%29%28-1%29%28-1%29=-1 ALIGN=MIDDLE  ALT=\"%28-1%29%28-1%29%28-1%29=-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > as a tip to remember: if the number of negatie signs to multiply is an odd number (here 3) then the answer is negative. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y ALIGN=MIDDLE  ALT=\"y\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5 ALIGN=MIDDLE  ALT=\"5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now let's substitute the variables for the computed values.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5%284%29%2825%29%28-1%29-%284%29%285%29 ALIGN=MIDDLE  ALT=\"5%284%29%2825%29%28-1%29-%284%29%285%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and we get<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-500-20 ALIGN=MIDDLE  ALT=\"-500-20\"   DISABLED_style= \"max-width:90%; height:auto;\" > which equals to<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-520 ALIGN=MIDDLE  ALT=\"-520\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Hope this helps </SPAN>\n" );
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