document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1094270>Question 1094270</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the following with substitution <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x%5E2-3x-sqrt%28x%5E2-3x%29=2+ ALIGN=MIDDLE  ALT=\"+x%5E2-3x-sqrt%28x%5E2-3x%29=2+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "My steps so far are \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+U+=sqrt%28x%5E2-3x%29+ ALIGN=MIDDLE  ALT=\"+U+=sqrt%28x%5E2-3x%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+U%5E2+-+U+=+2+ ALIGN=MIDDLE  ALT=\"+U%5E2+-+U+=+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+U%5E2-U-2=0+ ALIGN=MIDDLE  ALT=\"+U%5E2-U-2=0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28U-2%29%28U%2B1%29+ ALIGN=MIDDLE  ALT=\"+%28U-2%29%28U%2B1%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " U= 2, -1 \r<BR>\n" );
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document.write( "Then I went back using 2, -1 to plug back in\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+U+=sqrt%28x%5E2-3x%29+ ALIGN=MIDDLE  ALT=\"+U+=sqrt%28x%5E2-3x%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "And ended up getting <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+sqrt%28-2%29+ ALIGN=MIDDLE  ALT=\"+sqrt%28-2%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+sqrt%284%29+ ALIGN=MIDDLE  ALT=\"+sqrt%284%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > from both <BR>\n" );
document.write( "But -2 cant be it, so that would leave me with the 4 or 2,-2?<BR>\n" );
document.write( "I'm not sure how to go about this.<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 #708863 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=708863\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br>You used substitution to find U = sqrt(x^2-3x) is equal to either -1 or 2.<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28x%5E2-3x%29+=+-1 ALIGN=MIDDLE  ALT=\"sqrt%28x%5E2-3x%29+=+-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >  won't give you any solutions, because a square root is never negative.<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28x%5E2-3x%29+=+2 ALIGN=MIDDLE  ALT=\"sqrt%28x%5E2-3x%29+=+2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "gives you solutions.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-3x+=+4 ALIGN=MIDDLE  ALT=\"x%5E2-3x+=+4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-3x-4+=+0 ALIGN=MIDDLE  ALT=\"x%5E2-3x-4+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-4%29%28x%2B1%29+=+0 ALIGN=MIDDLE  ALT=\"%28x-4%29%28x%2B1%29+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The solutions are x=4 and x=-1; checking shows that both solutions work in the original equation.<BR>\n" );
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