document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=377689>Question 377689</A>: <I><SPAN STYLE=\"word-break: break-all;\">   <BR>\n" );
document.write( "  i need help with this problem: 2^2x+ 2^x - 12=0<BR>\n" );
document.write( "This is what i tried, but i think it's wrong:\r<BR>\n" );
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document.write( "I tried to factor out: (2^x+6)(1^x-2), and now i am totally lost! pls help! Thx! Pls note: the \"2x\" and the \"x\" are exponents of the numbers 2. difficult to show that on this screen.                  <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 #268385 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=268385\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> i need help with this problem: 2^2x+ 2^x - 12=0<BR>\n" );
document.write( "----<BR>\n" );
document.write( "It's a quadratic written in 2^x.<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Let w = 2^x<BR>\n" );
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document.write( "w^2 + w -12 = 0<BR>\n" );
document.write( "Factor:<BR>\n" );
document.write( "(w+4)(w-3) = 0<BR>\n" );
document.write( "w = -4 or w = 3<BR>\n" );
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document.write( "Solve for \"x\":<BR>\n" );
document.write( "2^x = -4 <BR>\n" );
document.write( "Impossible<BR>\n" );
document.write( "----<BR>\n" );
document.write( "2^x = 3<BR>\n" );
document.write( "x = ln3/ln2<BR>\n" );
document.write( "x = 1.4651..<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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