Find the foci of the ellipse $\frac{x^2}{9}+\frac{y^2}{4}=1$.

Step-by-step solution

1. Identify $a^2=9$ and $b^2=4$ from the standard form of the ellipse.
2. Compute $c^2=a^2-b^2=9-4=5$, hence $c=\sqrt{5}$.
3. Locate the foci on the major axis: $(\pm c,0)=(\pm \sqrt{5},0)$.

Concept tested: Ellipse – foci

Published 7 October 2026 · How this solution was prepared and checked