document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=867265>Question 867265</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve<BR>\n" );
document.write( "a)log(base 2)(x + 1)+ log(base 2)(x-1) = 3<BR>\n" );
document.write( "b)log(base 2)(x^2-1) = 3<BR>\n" );
document.write( "c)explain why the equations in part a and b are not equivalent <BR>\n" );
document.write( "Can you please help me out? Thanks so much in advance:) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #522918 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=522918\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a)<BR>\n" );
document.write( "log(base 2)(x + 1)+ log(base 2)(x-1) = 3<BR>\n" );
document.write( "2^log(base 2)(x + 1)*2^log(base 2)(x-1)=2^3<BR>\n" );
document.write( "(x+1)(x-1)=8<BR>\n" );
document.write( "x^2=9<BR>\n" );
document.write( "x=3<BR>\n" );
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document.write( "b)<BR>\n" );
document.write( "log(base 2)(x^2-1) = 3<BR>\n" );
document.write( "2^log(base 2)(x^2-1) =2^3<BR>\n" );
document.write( "x^2-1=8<BR>\n" );
document.write( "x^2=9<BR>\n" );
document.write( "x=3, x=-3<BR>\n" );
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document.write( "c) x can't equal -1 in a) because a log cannot equal 0 or be negative.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );