document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=691267>Question 691267</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the equation and express the solution in exact form...\r<BR>\n" );
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document.write( "log9(x-4)+log9(x-4)=1\r<BR>\n" );
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document.write( "This is what I have done...<BR>\n" );
document.write( "9=(x-4)(x-4)<BR>\n" );
document.write( "9=(x^2-4x-4x+16)<BR>\n" );
document.write( "-9           -9<BR>\n" );
document.write( "0=(x^2-8x+7)<BR>\n" );
document.write( "(x-7)(x-1)<BR>\n" );
document.write( "x=7, x=1\r<BR>\n" );
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document.write( "not sure what Iam doing wrong.... Thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #426629 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10552)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=426629\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "Solve the equation and express the solution in exact form...\r<BR>\n" );
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document.write( "log9(x-4)+log9(x-4)=1\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "This is what I have done...<BR>\n" );
document.write( "9=(x-4)(x-4)<BR>\n" );
document.write( "9=(x^2-4x-4x+16)<BR>\n" );
document.write( "-9           -9<BR>\n" );
document.write( "0=(x^2-8x+7)<BR>\n" );
document.write( "(x-7)(x-1)<BR>\n" );
document.write( "x=7, x=1\r<BR>\n" );
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document.write( "not sure what Iam doing wrong.... Thanks!\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=log+%289%2C+%28x+-+4%29%29+%2B+log+%289%2C+%28x+-+4%29%29+=+1+ ALIGN=MIDDLE  ALT=\"log+%289%2C+%28x+-+4%29%29+%2B+log+%289%2C+%28x+-+4%29%29+=+1+\"   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=log+%289%2C+%28%28x+-+4%29%28x+-+4%29%29%29+=+1 ALIGN=MIDDLE  ALT=\"log+%289%2C+%28%28x+-+4%29%28x+-+4%29%29%29+=+1\"   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=%28x+-+4%29%28x+-+4%29+=+9%5E1 ALIGN=MIDDLE  ALT=\"%28x+-+4%29%28x+-+4%29+=+9%5E1\"   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=x%5E2+-+8x+%2B+16+=+9 ALIGN=MIDDLE  ALT=\"x%5E2+-+8x+%2B+16+=+9\"   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=x%5E2+-+8x+%2B+16+%96+9+=+0 ALIGN=MIDDLE  ALT=\"x%5E2+-+8x+%2B+16+%96+9+=+0\"   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=x%5E2+-+8x+%2B+7+=+9 ALIGN=MIDDLE  ALT=\"x%5E2+-+8x+%2B+7+=+9\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "(x - 1)(x - 7) = 0\r<BR>\n" );
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document.write( "x = 1 (ignore as this value will result in a NEGATIVE log value)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28x+=+7+%29 ALIGN=MIDDLE  ALT=\"highlight_green%28x+=+7+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Your answers are CORRECT. However, you need to do the check, which as you'll see will eliminate <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+1 ALIGN=MIDDLE  ALT=\"x+=+1\"   DISABLED_style= \"max-width:90%; height:auto;\" > as a solution, thus leaving the only solution as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+7 ALIGN=MIDDLE  ALT=\"x+=+7\"   DISABLED_style= \"max-width:90%; height:auto;\" > (see above).\r<BR>\n" );
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document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com </SPAN>\n" );
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