The equation is .
The standard form of the equation of an ellipse center (h, k) with major and minor axes of lengths 2a and 2b (where 0 < b < a) is or
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The vertices and foci lie on the major axis, a and c units, respectively, from the center (h, k) and the relation between a, b and c is c2 = a2 - b2.
\Write the given equation in standard form by completing the squares. \ \
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Because the denominator of the y2 - term (4) is smaller than the denominator of the x2 - term (36), the major axis is horizontal.
\Compare the equation with
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a2 = 36, b2 = 4, h = 2 and k = - 3.
\a = 6 and b = 2.
\To find the value of c, substitute the value of a2 = 36 and b2 = 4 in c2 = a2 - b2.
\c2 = 36 - 4 = 32 \ \
\c = ± 4√2.
\Center = (h, k ) = (2, - 3).
\Foci = (h ± c, k ) = (2 ± 4√2, - 3). \ \
\The graph of the ellipse is translated 2 units to the right and down 3 units.
\The center is at (2, - 3) and the foci are at (2 + 4√2, - 3) and (2 - 4√2, - 3).
\The length of the major axis is still 12 units, and the length of the minor axis is still 4 units.
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