document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=581756>Question 581756</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 3. Find all real solutions to the following:<BR>\n" );
document.write( "a) log2(x - 2) + log2(x + 1) = log2 10 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #371800 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=371800\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> log2(x - 2) + log2(x + 1) = log2 10<BR>\n" );
document.write( "log2(x - 2)(x + 1) = log2 10<BR>\n" );
document.write( "(x - 2)(x + 1) = 10<BR>\n" );
document.write( "x^2+x-2x-2 = 10<BR>\n" );
document.write( "x^2-x-2 = 10<BR>\n" );
document.write( "x^2-x-12 = 0<BR>\n" );
document.write( "(x-4)(x+3) = 0<BR>\n" );
document.write( "x = {-3, 4}<BR>\n" );
document.write( "The -3 is an \"extraneous\" solution so we throw it out leaving:<BR>\n" );
document.write( "x = 4<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );