1. **State the problem:**
We are given the ellipse equation $$\frac{(x + 11)^2}{25} + \frac{(y - 2)^2}{9} = 1$$ and need to analyze its properties.
2. **Formula and rules:**
The standard form of an ellipse centered at $ (h, k) $ is:
$$\frac{(x - h)^2}{a^2} + \frac{(y - k)^2}{b^2} = 1$$
where $a$ and $b$ are the lengths of the semi-major and semi-minor axes respectively.
3. **Identify center and axes:**
From the equation, center is $(-11, 2)$.
Denominators give $a^2 = 25$ and $b^2 = 9$.
So, $a = 5$ and $b = 3$.
4. **Determine major and minor axes:**
Since $a > b$, the major axis length is $2a = 10$ and minor axis length is $2b = 6$.
5. **Find foci:**
Foci distance from center is $c = \sqrt{a^2 - b^2} = \sqrt{25 - 9} = \sqrt{16} = 4$.
Since major axis is along x-axis, foci are at $(-11 \pm 4, 2)$, i.e., $(-15, 2)$ and $(-7, 2)$.
6. **Summary:**
- Center: $(-11, 2)$
- Semi-major axis: $5$
- Semi-minor axis: $3$
- Foci: $(-15, 2)$ and $(-7, 2)$
**Final answer:** The ellipse is centered at $(-11, 2)$ with semi-major axis length $5$ along the x-axis and semi-minor axis length $3$ along the y-axis.
Ellipse Properties 3Ec01B
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