How to Find Foci?

Identify the conic section

Write its equation in standard form

Determine whether it is an ellipse, hyperbola, or parabola

For an ellipse, find the center and the values of (a) and (b)

Compute (c) using (c^2 = a^2 – b^2)

Locate the foci at ((h pm c, k)) or ((h, k pm c)), depending on the major axis

For a hyperbola, find the center and the values of (a) and (b)

Compute (c) using (c^2 = a^2 + b^2)

Locate the foci at ((h pm c, k)) or ((h, k pm c)), depending on the transverse axis

For a parabola, identify the vertex and focus form

Use the standard form to find the focus from the vertex and parameter (p)

For (y^2 = 4px), the focus is ((p, 0))

For (x^2 = 4py), the focus is ((0, p))

Shift the focus coordinates by the center or vertex if the conic is translated

Verify the axis orientation before finalizing the foci

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