document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=89671>Question 89671</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Write the equation of the circle that has a diameter whose endpoints are (3,-5) and (-7,3).  Write the equation in General Form which is:  x2+y2+Dx+Ey+F=0<BR>\n" );
document.write( "The \"2's\" are exponents.  I am stumped on this last bit of work I need to know.  Can you please help me?\r<BR>\n" );
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document.write( "Thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #65136 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=65136\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> an equation for a circle centered at (h,k) with a radius of r is (x-h)^2+(y-k)^2=r^2\r<BR>\n" );
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document.write( "the center of this circle is the midpoint of the diameter ... ((3-7)/2,(-5+3)/2) or (-2,-1)\r<BR>\n" );
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document.write( "the radius is the distance from the center to one of the ends ... r^2=(-2-3)^2+(-1-(-5))^2 ... r^2=25+16=41\r<BR>\n" );
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document.write( "so (x+2)^2+(y+1)^2=41 ... x^2+4x+4+y^2+2y+1=41 ... x^2+y^2+4x+2y-36=0 </SPAN>\n" );
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