document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=204945>Question 204945</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve by using quadratic formula:\r<BR>\n" );
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document.write( "x^2 +4x+3 = 0\r<BR>\n" );
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document.write( "Thanks !!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #154692 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=154692\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^2 +4x +3 =0<BR>\n" );
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document.write( "a=1,,,b=4,,,,c=3,,,,,from  ax^2 +bx+c=0<BR>\n" );
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document.write( "x=[ -(b) +/-sqrt{(b)^2 - 4 (a)(c) }]/2(a)<BR>\n" );
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document.write( "x=[ -(4) +/- sqrt{ (4)^2 -4(1)(3)}]/2(1)<BR>\n" );
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document.write( "x=[ -4 +/sqrt{16-12}]/2<BR>\n" );
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document.write( "x= [ -4 +/- 2]/2 <BR>\n" );
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document.write( "x= (-4-2)/2 = -3,,,,,x=(-4+2)/2 = -1<BR>\n" );
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document.write( "checking,,, factor  original  quadratic, x^2 +4x +3 = (x+3)(x+1)<BR>\n" );
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document.write( "set  equal  to  zero ,,,x+3=0,,,x=-3,,,,,,x+1=0,,,x=-1,,,,,,,ok<BR>\n" );
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