document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=288289>Question 288289</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need to complete the square: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%5E2%2B10x-3+=0 ALIGN=MIDDLE  ALT=\"2x%5E2%2B10x-3+=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I've been using <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%5E2%2B4x-1=0 ALIGN=MIDDLE  ALT=\"2x%5E2%2B4x-1=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > to figure out the formula since I know the answer to this second one. <BR>\n" );
document.write( "I used the Complete the Square Solver on here, but it comes up with a different answer than the book.<BR>\n" );
document.write( "The formula I'm using is: x=-4 +or- square root of (4)^2-4(2)(-1) over 2(2)<BR>\n" );
document.write( "so, -4+or- square root of 16 + 8 over 4<BR>\n" );
document.write( "then -4+or- square root of 24 over 4<BR>\n" );
document.write( "then -4+or- 2 times square root of 6 over 4<BR>\n" );
document.write( "after simplifying, i get -1+or- square root of 6 over 2.<BR>\n" );
document.write( "My book says the answer is -2+or- square root of 6 over 2.<BR>\n" );
document.write( "Where did I go wrong?? If I can't solve THIS one, then I know I can't solve the others.<BR>\n" );
document.write( "Could somebody please explain where I messed up? I'm assuming I should have multiplied something by 2 somewhere along the way to come up with the book answer, but I can't figure out where or more importantly, WHY.<BR>\n" );
document.write( "Thanks for any help given, I appreciate it! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #208965 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=208965\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2x^2+10x-3 =0<BR>\n" );
document.write( "2x^2+10x=3<BR>\n" );
document.write( "2*(x^2+5x)=3<BR>\n" );
document.write( "x^2+5x+25/4=6/4+25/4\r<BR>\n" );
document.write( "\n" );
document.write( "x^2+5x+25/4=31/4<BR>\n" );
document.write( "(x+5/2)^2=(31/4)<BR>\n" );
document.write( "x = 1/2 (sqrt(31)-5)<BR>\n" );
document.write( "x = 1/2 (-5-sqrt(31))\r<BR>\n" );
document.write( "\n" );
document.write( "2x^2+4x-1=0<BR>\n" );
document.write( "2x^2+4x=1<BR>\n" );
document.write( "2(x^2+2x+1)=3<BR>\n" );
document.write( "2(x+1)^2=3<BR>\n" );
document.write( "x = 1/2 (sqrt(6)-2)<BR>\n" );
document.write( "x = 1/2 (-2-sqrt(6)) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );