document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=965478>Question 965478</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Which of the following is an equation of a circle with a center at (-1, 0)?\r<BR>\n" );
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document.write( "A. (x-1)^2 + (y)^2 = 6 <BR>\n" );
document.write( "B. (x-1)^2 - (y)^2 = 3<BR>\n" );
document.write( "C. (x+1)^2 - (y)^2 = 8<BR>\n" );
document.write( "D. (x+1)^2 + (y)^2 = 5 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #590150 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=590150\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (h,k) is the centers of the circle.<BR>\n" );
document.write( "since the center of rthe circle is at (-1,0), this means that:<BR>\n" );
document.write( "h = -1<BR>\n" );
document.write( "k = 0\r<BR>\n" );
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document.write( "the general form of the equation of a circle is (x-h)^2 + (y-k)^2 = r^2\r<BR>\n" );
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document.write( "(h,k) is the center of the circle.<BR>\n" );
document.write( "r is the radius of the circle.\r<BR>\n" );
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document.write( "selection A and selection D fit this form.\r<BR>\n" );
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document.write( "of the two, selection D is the right one because:\r<BR>\n" );
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document.write( "(x+1)^2 + (y)^2 = 5 tells you that:\r<BR>\n" );
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document.write( "x+1 = x-h which makes -h = 1 which makes h = -1.\r<BR>\n" );
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document.write( "y = y-k which makes -k = 0 which makes k equal 0.\r<BR>\n" );
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document.write( "fyi:<BR>\n" );
document.write( "0 has no sign.<BR>\n" );
document.write( "-0 and 0 are the same value.\r<BR>\n" );
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document.write( "your solution is selection D.\r<BR>\n" );
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document.write( "the radius of that circle is sqrt(5).\r<BR>\n" );
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document.write( " </SPAN>\n" );
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