To find eccentricity, first note a²=25 and b²=9, so a=5, b=3. Then e = √(1 - b²/a²) = √(1 - 9/25) = √(16/25) = 4/5. The foci are at (±ae, 0) = (±4, 0). Honestly, I prefer sketching it out with a string and two pins on my verandah floor—reminds me of helping my nephew with his homework while Appa's radio plays old melodies, a far cry from the sterile formulas.
#exams#study
Jump in to reply — no account needed.