document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=273005>Question 273005</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do I find a root of the equation 2x^2-x-15=0\r<BR>\n" );
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document.write( "ALSO\r<BR>\n" );
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document.write( "How do I find the x coordinate of the vertex for the quadratic equation x^2+6x+5=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 #199518 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=199518\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How do I find a root of the equation 2x^2-x-15=0<BR>\n" );
document.write( "Think of two numbers whose product is -15*2 = -30<BR>\n" );
document.write( "and whose sum is -1<BR>\n" );
document.write( "The numbers are -6 and +5<BR>\n" );
document.write( "Replace -x by -6x+5x and factor:<BR>\n" );
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document.write( "2x^2 -6x + 5x - 15 = 0<BR>\n" );
document.write( "2x(x-3) + 5(x-3) = 0<BR>\n" );
document.write( "(x-3)(2x+5) = 0<BR>\n" );
document.write( "x = 3 or x = -5/2<BR>\n" );
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document.write( "ALSO <BR>\n" );
document.write( "How do I find the x coordinate of the vertex for the quadratic equation x^2+6x+5=0<BR>\n" );
document.write( "The x-value of the vertex is -b/2a = -6/(2*1) = -3<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
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