document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=800476>Question 800476</A>: <I><SPAN STYLE=\"word-break: break-all;\"> PLEASE HELP ME! HOMEWORK DUE SOON!!<BR>\n" );
document.write( "Find the equation of the circle passing through the points (-1,1) (1,3) and having the centre on the x-axis.\r<BR>\n" );
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document.write( "Please help me!! The only part of this question that i do not understand is the centre passing through the x-axis bit because if i knew the centre of this circle and two points then I will be able to do this question.\r<BR>\n" );
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document.write( "Please help me!! Thank You! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #483090 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=483090\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> P(-1,1) Q(1,3)\r<BR>\n" );
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document.write( "center on x axis\r<BR>\n" );
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document.write( "so y co ordinate of center =0\r<BR>\n" );
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document.write( "let the center = O(x,0)\r<BR>\n" );
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document.write( "l(OP) =l(OQ)\r<BR>\n" );
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document.write( "(x+1)^2+(0-1)^2= (x-1)^2+(0-3)^2\r<BR>\n" );
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document.write( "x^2+2x+1+1 =x^2-2x+1+9\r<BR>\n" );
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document.write( "4x=8<BR>\n" );
document.write( "x=2\r<BR>\n" );
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document.write( "The center = (2,0)\r<BR>\n" );
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document.write( "Now you can complete\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );