document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=165018>Question 165018</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321233832/algebrahomeworkh>elementary and intermediate algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Please help.I need to know if I did this right?Thank you!\r<BR>\n" );
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document.write( "2.If x = 1 and x = -8, then form a quadratic equation. <BR>\n" );
document.write( "(x-1)(x-(-8))=0<BR>\n" );
document.write( "(x-1)=0 <BR>\n" );
document.write( "      (x-(-8))=0  <BR>\n" );
document.write( "x-1=0<BR>\n" );
document.write( "x=-1<BR>\n" );
document.write( "(x-(-8)=0<BR>\n" );
document.write( "(x+8)=0<BR>\n" );
document.write( "x+0<BR>\n" );
document.write( "x=-8<BR>\n" );
document.write( "x=-8,-1  <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 #121624 by </B><A HREF=/tutors/aboutme.mpl?userid=MRperkins><B>MRperkins(300)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MRperkins><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=MRperkins><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=121624\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Not quite.<BR>\n" );
document.write( "You are trying to get this into a quadratic equation which is:<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( ".<BR>\n" );
document.write( "you have the right idea with the first part of your problem.<BR>\n" );
document.write( "You wrote:<BR>\n" );
document.write( "(x-1)(x-(-8))=0\r<BR>\n" );
document.write( "\n" );
document.write( "However, you need to multiply these and get a function of x in which <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ax%5E2%2Bbx%2Bc=0 ALIGN=MIDDLE  ALT=\"ax%5E2%2Bbx%2Bc=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So, FOIL and get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2%2B8x-x-8=0 ALIGN=MIDDLE  ALT=\"x%5E2%2B8x-x-8=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Combine like terms<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2%2B7x-8=0 ALIGN=MIDDLE  ALT=\"x%5E2%2B7x-8=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ax%5E2%2Bbx%2Bc=0 ALIGN=MIDDLE  ALT=\"ax%5E2%2Bbx%2Bc=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So:<BR>\n" );
document.write( "a=1<BR>\n" );
document.write( "b=7<BR>\n" );
document.write( "c=(-8)<BR>\n" );
document.write( "Now plug these numbers into the quadratic equation<BR>\n" );
document.write( ".<BR>\n" );
document.write( ":<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-%287%29+%2B-+sqrt%28+%287%29%5E2-4%2A%281%29%28-8%29%29+%29%2F%282%2A%281%29%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-%287%29+%2B-+sqrt%28+%287%29%5E2-4%2A%281%29%28-8%29%29+%29%2F%282%2A%281%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );