document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1030164>Question 1030164</A>: <I><SPAN STYLE=\"word-break: break-all;\"> For the equation X2-13x=30, I got the answer (x-15)(X+2)by setting to zero so that: X squared  -13x=30 becomes X squared -13x-30=0.<BR>\n" );
document.write( "I found that -15 times 2 equals 30, and -15 plus 2 = -13.  when I checked the answer, it said that X= -2 and X+15. Why isn't it 2 and -15?<BR>\n" );
document.write( "Help, please?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #645061 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=645061\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  For the equation X2-13x=30, I got the answer (x-15)(X+2)by setting to zero so that: X squared -13x=30 becomes X squared -13x-30=0.<BR>\n" );
document.write( "I found that -15 times 2 equals 30, and -15 plus 2 = -13. when I checked the answer, it said that X= -2 and X+15. Why isn't it 2 and -15?<BR>\n" );
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document.write( "x^2 - 13x - 30 = 0<BR>\n" );
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document.write( "You factored it so you could \"see\" the answer:<BR>\n" );
document.write( "(x-15)(x+2) = 0<BR>\n" );
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document.write( "That product will be zero if x = +15 or is x = -2<BR>\n" );
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document.write( "Right:<BR>\n" );
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document.write( "Procedure::<BR>\n" );
document.write( "When you have (x-15)(x+2) = 0<BR>\n" );
document.write( "Solve x-15 = 0, so x = 15<BR>\n" );
document.write( "Solve x+2 = 0, so x = -2<BR>\n" );
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document.write( "That way you will get the correct answers.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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