Home › AP EAPCET (Engineering) › Mathematics › Coordinate Geometry: Ellipse › The foci of 25x² + 169y² = 4225 are:
The foci of 25x² + 169y² = 4225 are:
A(±13, 0)
B(0, ±12)
C(±5, 0)
D(±12, 0)
Answer & Solution
Correct answer: D. (±12, 0)
The equation is x²/169 + y²/25 = 1, so c² = 169 - 25 = 144 and the foci are (±12, 0).
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