document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=159230>Question 159230</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Factoring Completely: How do you factor a problem like this: (x^2 + 10x + 21) <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 #117364 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=117364\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Factoring Completely: How do you factor a problem like this: (x^2 + 10x + 21) <BR>\n" );
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document.write( "It'll be (x + a)*(x + b), since there are no minus signs.<BR>\n" );
document.write( "These problems always use integers.<BR>\n" );
document.write( "So a and b multiply to 21, and add up to 10.<BR>\n" );
document.write( "21 can only be 1x21 or 3x7.<BR>\n" );
document.write( "Only 3 and 7 add up to 10, so it's<BR>\n" );
document.write( "(x + 3)*(x + 7)<BR>\n" );
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