Question

The ellipse with x-intercepts at (4, 0) and (-4, 0), y-intercepts at (0, 9) and (0, -9), and center at (0, 0).

a^2=20
b^2=81
@mathmale
@freckles

Answer 1

@ganeshie8

Answer 2

your b^2 is right since the distance from 9 to 0 is 9 so b=9

Answer 3

but your distance from 4 to 0 is incorrect

Answer 4

remember that a is the distance from one x-intercept to the center (0,0)
and that b is the distance from one y-intercept to the center (0,0)