document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=194672>Question 194672</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780395977255/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> i keep coming up with the wrong answers for the foci of this equation. please help.\r<BR>\n" );
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document.write( "4x^2-y^2+1=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #146053 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=146053\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 4x^2 -y^2 +1 =0<BR>\n" );
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document.write( "rearranging<BR>\n" );
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document.write( "x^2/(1/4) -y^2/1 = -1<BR>\n" );
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document.write( "multiply  by  (-1)<BR>\n" );
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document.write( "- x^2/(1/4)  +y^2/1 = 1<BR>\n" );
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document.write( "this  fits  form  of a  (y) hyperbola,,,,  with  a^2 =1/4,,,,b^2 = 1<BR>\n" );
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document.write( "remember  c^2 = a^2  + b^2  = 1/4 +1 = 1.25<BR>\n" );
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document.write( "c  = 1.118<BR>\n" );
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document.write( "FOCI  ( 0,  +/- 1.118)  or   (0,1.118) and  (0, -1.118) </SPAN>\n" );
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