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### Section 4-3 : Ellipses

For problems 1 – 7 sketch the ellipse.

1. $$\displaystyle \frac{{{{\left( {x + 5} \right)}^2}}}{4} + \frac{{{{\left( {y - 2} \right)}^2}}}{9} = 1$$
2. $$\displaystyle {\left( {x - 4} \right)^2} + \frac{{{y^2}}}{{16}} = 1$$
3. $$\displaystyle \frac{{{{\left( {x + 1} \right)}^2}}}{{25}} + \frac{{{{\left( {y + 6} \right)}^2}}}{4} = 1$$
4. $$\displaystyle \frac{{{{\left( {x - 3} \right)}^2}}}{5} + \frac{{{{\left( {y + 1} \right)}^2}}}{{12}} = 1$$
5. $$9{\left( {x - 2} \right)^2} + 4{\left( {y - 3} \right)^2} = 1$$
6. $$\displaystyle \frac{{{{\left( {x - 3} \right)}^2}}}{9} + 2{\left( {y + 4} \right)^2} = 1$$
7. $$\displaystyle \frac{{{{\left( {x - 4} \right)}^2}}}{9} + \frac{{{{\left( {y - 1} \right)}^2}}}{9} = 1$$

For problems 8 – 10 complete the square on the $$x$$ and $$y$$ portions of the equation and write the equation into the standard form of the equation of the ellipse.

1. $$4{x^2} - 16x + {y^2} + 2y + 13 = 0$$
2. $${x^2} + 6x + 4{y^2} + 16y + 9 = 0$$
3. $$5{x^2} + 10x + 3{y^2} - 6y - 7 = 0$$