Find the equation of the ellipse, whose length of the major axis is 20 and foci are `(0,+-5)`.

Explanation

To find the equation of the ellipse given the length of the major axis and the coordinates of the foci, we can follow these steps:

### Step 1: Identify the given information
- Length of the major axis = 20
- Foci = (0, ±5)

### Step 2: Determine the value of 'a'
The length of the major axis is given by \(2a\). Therefore, we can find 'a' as follows:
...