document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=370623>Question 370623</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A common student error when solving a quadratic equation is simplifying incorrectly. Consider the following INCORRECT solution:\r<BR>\n" );
document.write( "\n" );
document.write( "2+/- the square root of 7 divided by  2 <BR>\n" );
document.write( "= <BR>\n" );
document.write( "1+/- square root of 7\r<BR>\n" );
document.write( "\n" );
document.write( "Explain why x= 1+-sqrt7 is the incorrect solution.\r<BR>\n" );
document.write( "\n" );
document.write( "Is this not able to be factored any further from 2+-sqrt7/2 because the whole numerator needs divided by 2? <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #264190 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=264190\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Yes, the ENTIRE numerator is divided by 2 which means that you'll need to reduce <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%287%29%2F2 ALIGN=MIDDLE  ALT=\"sqrt%287%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, but since you can't, it's best to leave the solution as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282%2B-sqrt%287%29%29%2F2 ALIGN=MIDDLE  ALT=\"%282%2B-sqrt%287%29%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );