Detailed description
PF one + PF two = 2a, ellipse, one positive and one negative y-intercept, one positive and one negative x-intercept, point marked as P. Foci at F one and F two. Line segments PF one and PF two drawn.
Quadratics
PF one + PF two = 2a, ellipse, one positive and one negative y-intercept, one positive and one negative x-intercept, point marked as P. Foci at F one and F two. Line segments PF one and PF two drawn.