document.write( "Question 627989: what is the foci of this ellipse. x^2/64 + y^2 =1 \n" ); document.write( "
Algebra.Com's Answer #395395 by lwsshak3(11628)\"\" \"About 
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what is the foci of this ellipse.
\n" ); document.write( "x^2/64 + y^2 =1
\n" ); document.write( "This is an equation of an ellipse with horizontal major axis
\n" ); document.write( "center: (0,0)
\n" ); document.write( "a^2=64
\n" ); document.write( "a=√64=8
\n" ); document.write( "b^2=1
\n" ); document.write( "b=1
\n" ); document.write( "c^2=a^2-b^2=64-1=63
\n" ); document.write( "c=√63≈7.9
\n" ); document.write( "foci: (0±c,0)=(0±7.9,0)=(-7.9,0) and (7.9,0)\r
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