
### Instruction: help me answer this question Vertices (± 5, 0) and foci (± 4, 0), think step by step
### Assistant: The vertices and foci given are on the x-axis, so the equation will be of the form x2/a2 + y2/b2 = 1. Here, a = 5, c = 4. Using a2 = b2 + c2, b2 = 25 – 16 = 9. So, the equation of the ellipse is x2/25 + y2/9 = 1. , The answer is The equation of the ellipse is x2/25 + y2/9 = 1
