document.write( "Question 713388: Write the standard form equation of an ellipse:
\n" ); document.write( "Vertices: (5,-3) (-3,-3)
\n" ); document.write( "Co-vertices: (1,0), (1, -6)\r
\n" ); document.write( "\n" ); document.write( "I know how to find the standard form with only two endpoints rather than four.
\n" ); document.write( "Thanks for your help!
\n" ); document.write( "

Algebra.Com's Answer #438698 by lwsshak3(11628)\"\" \"About 
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Write the standard form equation of an ellipse:
\n" ); document.write( "Vertices: (5,-3) (-3,-3)
\n" ); document.write( "Co-vertices: (1,0), (1, -6)
\n" ); document.write( "I know how to find the standard form with only two endpoints rather than four.
\n" ); document.write( "Thanks for your help!
\n" ); document.write( "**
\n" ); document.write( "Given data shows ellipse has a horizontal major axis.
\n" ); document.write( "Its standard form of equation: \"%28x-h%29%5E2%2Fa%5E2%2B%28y-k%29%5E2%2Fb%5E2=1\", a>b, (h,k)=(x,y) coordinates of center.
\n" ); document.write( "x-coordinate of center= (5+(-3))/2=2/2=1 (midpoint formula)
\n" ); document.write( "y-coordinate of center=-3
\n" ); document.write( "center:(1,-3)
\n" ); document.write( "length of horizontal major axis=8 (-3 to 5)=2a
\n" ); document.write( "a=4
\n" ); document.write( "a^2=16
\n" ); document.write( "length of minor axis (co-vertices)=6 (0 to 6)=2b
\n" ); document.write( "b=3
\n" ); document.write( "b^2=9
\n" ); document.write( "..
\n" ); document.write( "Equation of given ellipse:
\n" ); document.write( " \"%28x-1%29%5E2%2F16%2B%28y%2B3%29%5E2%2F9=1\"
\n" ); document.write( "
\n" );