document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=40557>Question 40557</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two resistors,when connected in series,have a total resistance of 40 ohms.When connected in parallel their total resistance is 8.4 ohms.If one of the resistors has a resistance of Rx ohms:<BR>\n" );
document.write( "(a) show that Rx^2-40Rx+336=0<BR>\n" );
document.write( "&<BR>\n" );
document.write( "(b)calculate the resistance of each.<BR>\n" );
document.write( "answers ( 12 ohms,28 ohms) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #25969 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=25969\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%281%29+%2B+R%282%29+=+40 ALIGN=MIDDLE  ALT=\"R%281%29+%2B+R%282%29+=+40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FR%281%29+%2B+1%2FR%282%29+=+1%2F8.4 ALIGN=MIDDLE  ALT=\"1%2FR%281%29+%2B+1%2FR%282%29+=+1%2F8.4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%5E2+-40R+%2B+336+=+0 ALIGN=MIDDLE  ALT=\"R%5E2+-40R+%2B+336+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"R+=+%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( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R+=+%2840+%2B-+sqrt%28+%28-40%29%5E2-4%2A1%2A336+%29%29%2F%282%2A1%29+ ALIGN=MIDDLE  ALT=\"R+=+%2840+%2B-+sqrt%28+%28-40%29%5E2-4%2A1%2A336+%29%29%2F%282%2A1%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R+=+%2840+%2B-+sqrt%28+1600+-+1344+%29%29%2F+2+ ALIGN=MIDDLE  ALT=\"R+=+%2840+%2B-+sqrt%28+1600+-+1344+%29%29%2F+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R+=+%2840+%2B-+sqrt%28+256+%29%29%2F+2+ ALIGN=MIDDLE  ALT=\"R+=+%2840+%2B-+sqrt%28+256+%29%29%2F+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R+=+20+%2B+8 ALIGN=MIDDLE  ALT=\"R+=+20+%2B+8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R+=+20+-+8 ALIGN=MIDDLE  ALT=\"R+=+20+-+8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "R = 28,12<BR>\n" );
document.write( "check these values<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%281%29+%2B+R%282%29+=+40 ALIGN=MIDDLE  ALT=\"R%281%29+%2B+R%282%29+=+40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2FR%281%29+%2B+1%2FR%282%29+=+1%2F8.4 ALIGN=MIDDLE  ALT=\"1%2FR%281%29+%2B+1%2FR%282%29+=+1%2F8.4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=28+%2B+12+=+40 ALIGN=MIDDLE  ALT=\"28+%2B+12+=+40\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F28+%2B+1%2F12+=+1%2F8.4 ALIGN=MIDDLE  ALT=\"1%2F28+%2B+1%2F12+=+1%2F8.4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply both sides by 4<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F7+%2B+1%2F3+=+1%2F2.1 ALIGN=MIDDLE  ALT=\"1%2F7+%2B+1%2F3+=+1%2F2.1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply both sides by 21<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3+%2B+7+=+10 ALIGN=MIDDLE  ALT=\"3+%2B+7+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );