document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1038879>Question 1038879</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve by two methods, quadratic equation and factoring:<BR>\n" );
document.write( "2x^2-x-15=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #653609 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52779)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=653609\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Solve by two methods, quadratic equation and factoring:<BR>\n" );
document.write( "2x^2-x-15=0<BR>\n" );
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document.write( "As I just said in <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/quadratic/Quadratic_Equations.faq.question.1038843.html>https://www.algebra.com/algebra/homework/quadratic/Quadratic_Equations.faq.question.1038843.html</A>, \r<BR>\n" );
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document.write( "solve on your own at least by the quadratic formula.\r<BR>\n" );
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document.write( "Demonstrate that you can do this arithmetic.\r<BR>\n" );
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document.write( "<U>Comment from student</U>:\r<BR>\n" );
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document.write( "Solve by 2 methods,Quad Equation and Factoring : 2x^2-x-15=0 \r\n" );
document.write( "You ask me to show, this may or may not be right \r\n" );
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document.write( "X=-b±&#8730;b^2-4ac/2a. a=2, b= -1, c= -15 X=-(-1)±&#8730;1^2+4^2(-15)/2^2 X1,2=(1±11)/2^2 X1=12/4= 3 X2=-10/4= -5/2 \r\n" );
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document.write( "Having problems with getting my zero Factoring right and checking problem \r\n" );
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document.write( "<U>My responce</U>: Bravo that you found a courage to start it.\r<BR>\n" );
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document.write( "Your calculations are incorrect, and I see that you really need help. Let me fix it:\r<BR>\n" );
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document.write( "X = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281+%2B-+sqrt%28%28-1%29%5E2+-+4%2A2%2A%28-15%29%29%29%2F4 ALIGN=MIDDLE  ALT=\"%281+%2B-+sqrt%28%28-1%29%5E2+-+4%2A2%2A%28-15%29%29%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281+%2B-+sqrt%281+%2B+120%29%29%2F4 ALIGN=MIDDLE  ALT=\"%281+%2B-+sqrt%281+%2B+120%29%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281+%2B-+sqrt%28121%29%29%2F4 ALIGN=MIDDLE  ALT=\"%281+%2B-+sqrt%28121%29%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281+%2B-+11%29%2F4 ALIGN=MIDDLE  ALT=\"%281+%2B-+11%29%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B1%5D ALIGN=MIDDLE  ALT=\"x%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12%2F4 ALIGN=MIDDLE  ALT=\"12%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3 ALIGN=MIDDLE  ALT=\"3\"   DISABLED_style= \"max-width:90%; height:auto;\" >,  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5B2%5D ALIGN=MIDDLE  ALT=\"x%5B2%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-10%2F4 ALIGN=MIDDLE  ALT=\"-10%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5%2F2 ALIGN=MIDDLE  ALT=\"-5%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r\n" );
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document.write( "Now factoring:\r\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%5E2-x-15 ALIGN=MIDDLE  ALT=\"2x%5E2-x-15\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2A%28x-x%5B1%5D%29%2A%28x-x%5B2%5D%29 ALIGN=MIDDLE  ALT=\"2%2A%28x-x%5B1%5D%29%2A%28x-x%5B2%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2A%28x+-+3%29%2A%28x-%28-5%2F2%29%29 ALIGN=MIDDLE  ALT=\"2%2A%28x+-+3%29%2A%28x-%28-5%2F2%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-3%29%2A%282x%2B5%29 ALIGN=MIDDLE  ALT=\"%28x-3%29%2A%282x%2B5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r\n" );
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