document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=131928>Question 131928</A>: <I><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "(7x^2-x-4)-(9x^2-10x+8)+(12x^2+4x-6) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #96569 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=96569\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 7X^2-X-4<BR>\n" );
document.write( "-9X^2+10X-8<BR>\n" );
document.write( "12X^2+4X-6<BR>\n" );
document.write( "----------------------------<BR>\n" );
document.write( "10X^2+13X-18<BR>\n" );
document.write( "USING THE QUADRATIC EQUATION:<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;\" > WE GET:<BR>\n" );
document.write( "X=(-13+-SQR[13^2-4*10*-18])/2*10<BR>\n" );
document.write( "X=(-13+-SQRT[169+720])/20<BR>\n" );
document.write( "X=(-13+-SQRT889]/20<BR>\n" );
document.write( "X=(-13+-29.82)/20<BR>\n" );
document.write( "X=(-13+29.82)/20<BR>\n" );
document.write( "X=16.82/20<BR>\n" );
document.write( "X=.84 ANSWER.<BR>\n" );
document.write( "X=(-13-29.82)/20<BR>\n" );
document.write( "X=-42.82/20<BR>\n" );
document.write( "X=-2.14 ANSWER.<BR>\n" );
document.write( " </SPAN>\n" );
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